Integrated New Energy Vehicle Frame and New Energy Truck

Abstract

The present invention relates to the technical field of truck frames. Specifically, it relates to an integrated new energy vehicle frame and a new energy truck, which includes a first main beam, a second main beam, and a battery box frame disposed between the first main beam and the second main beam; the length directions of the first main beam and the second main beam are the same and are longitudinal, and the opposite ends of the battery box frame are respectively fixedly connected to the first main beam and the second main beam. It can integrate the battery pack on the main beam of the vehicle frame without occupying the space of the cargo box and the cab, thereby maintaining sufficient cargo loading capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of truck frames, and more particularly, to an integrated new energy vehicle frame and a new energy truck. Background Art

[0002] With the continuous global attention to environmental protection and energy utilization efficiency, electric vehicle technology has become increasingly prominent in the automotive industry, especially in the fields of commercial vehicles and heavy trucks. Traditional heavy trucks rely on fuel engines, resulting in high energy consumption and environmental pollution, which does not conform to the trend of green development. In contrast, electric heavy trucks achieve the goal of zero tailpipe emissions by adopting a battery drive system, while optimizing energy utilization efficiency, which is of great significance for reducing carbon emissions and promoting sustainable development. However, despite the significant environmental benefits brought by electrification technology, there are still several technical challenges and limitations at the specific application level.

[0003] Existing technical solutions and their drawbacks:

[0004] Truck frame structure and battery layout: The frame design of traditional heavy trucks focuses on load-bearing and power transmission to ensure vehicle stability and safety. The battery pack is usually arranged behind the cab to avoid occupying the cargo box space, thus maintaining sufficient cargo loading capacity. However, this layout sacrifices some cargo space, resulting in limited transportation capacity and potentially uneven load distribution, affecting vehicle handling and stability. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated new energy vehicle frame that can integrate the battery pack on the main beam of the frame without occupying the cargo box and cab space, thus maintaining sufficient cargo loading capacity.

[0006] Another purpose of the present invention is to provide a new energy truck that can integrate the battery pack on the main beam of the frame without occupying the cargo box and cab space, thus maintaining sufficient cargo loading capacity.

[0007] The technical solution of the present invention is realized as follows:

[0008] An integrated new energy vehicle frame includes a first main beam, a second main beam, and a battery box frame disposed between the first main beam and the second main beam;

[0009] The length directions of the first main beam and the second main beam are the same and are longitudinal, and the opposite ends of the battery box frame are respectively fixedly connected to the first main beam and the second main beam.

[0010] Further, the battery box body frame includes an I-shaped combined structure and two load-bearing main body structures. The opposite ends of the I-shaped combined structure are respectively fixedly connected to the first main beam and the second main beam;

[0011] The I-shaped combined structure has two U-shaped grooves. The two load-bearing main body structures are symmetrically arranged at the openings of the two U-shaped grooves on both sides of the I-shaped combined structure. After the load-bearing main body structure is connected to the I-shaped combined structure, the battery box body frame in the shape of a Chinese character "Ri" is formed.

[0012] Further, the I-shaped combined structure at least includes a central shaft member and two fixing members. The length direction of the central shaft member is longitudinal. The two fixing members are symmetrically arranged at the opposite ends of the central shaft member, and the central shaft member is vertically arranged with the fixing members.

[0013] Further, the I-shaped combined structure is an integrally combined I-shaped beam. The upper part of the central shaft member is an upper box-shaped beam, the middle part of the central shaft member is a middle box-shaped beam, the lower part of the central shaft member is a lower trough-shaped beam. A number of I-shaped beam reinforcing ribs are respectively arranged on both sides of the I-shaped combined structure. The internal space of the I-shaped combined structure is used to accommodate power cables and water-cooling pipelines.

[0014] Further, the fixing member includes a fixing plate body and a reinforcing rib. The central shaft member is connected to one side surface of the fixing plate body, and a plurality of reinforcing ribs are arranged at the corners of the central shaft member and the fixing plate body.

[0015] Further, the first main beam includes at least two first trough-shaped beams, and the second main beam includes at least two second trough-shaped beams;

[0016] The fixing member further includes an assembly cross beam. The assembly cross beam is arranged on the other side surface of the fixing plate body. At least two insertion slots are longitudinally opened on the assembly cross beam. The first trough-shaped beam and the second trough-shaped beam are respectively inserted into the insertion slots of the two fixing members and fixedly connected to the assembly cross beam.

[0017] Further, the cross-sectional shape of the insertion slot is the same as the cross-sectional shape of the first trough-shaped beam or the second trough-shaped beam;

[0018] The first main beam includes two first trough-shaped beams symmetrically arranged with respect to the central shaft member, and the second main beam includes two second trough-shaped beams symmetrically arranged with respect to the central shaft member. The assembly cross beam is arranged in the middle of the fixing plate body, and the assembly cross beam is an axisymmetric structure with respect to the central shaft member. Two insertion slots are symmetrically opened at both ends of the assembly cross beam. A plurality of reinforcing rib plates are also arranged at the corners of the assembly cross beam and the fixing plate body.

[0019] Further, the load-bearing main body structure is U-shaped. The load-bearing main body structure includes a longitudinal load-bearing plate and two transverse load-bearing plates provided at both ends of the longitudinal load-bearing plate. The two transverse load-bearing plates are respectively fixedly connected to two fixing members, and the U-shaped cavity of the load-bearing main body structure communicates with the U-shaped groove of the I-shaped combined structure to form a rectangular accommodation space for installing a battery cell module and a water-cooled plate.

[0020] Further, a plurality of longitudinal ribs are provided on the inner side of the longitudinal load-bearing plate, and a plurality of transverse ribs are provided on the inner side of the transverse load-bearing plate;

[0021] The longitudinal load-bearing plate and the transverse load-bearing plate are fixedly connected by an end plate connecting member, and at least one connecting hole for connecting the carriage is respectively opened at the top and bottom of the end plate connecting member.

[0022] A new energy truck includes the integrated new energy vehicle frame described above.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] The present application provides an integrated new energy vehicle frame, which integrates the battery box frame on the vehicle frame main beam, connects the battery box frame between the first main beam and the second main beam, and the vehicle frame main beam forms a three-section integrated structure, realizing modular assembly and customized expansion of the battery capacity. Moreover, the battery box frame can be used to install the battery pack and the water-cooled plate. Therefore, integrating the battery box frame on the vehicle frame main beam does not occupy the space of the cargo box and the cab, thus maintaining sufficient cargo loading capacity and not causing problems such as limited transportation capacity, uneven load distribution, and affecting the handling and stability of the vehicle. At the same time, the battery box frame and the vehicle frame beam are an integrated structure, with high strength and improved sealing performance of the battery frame. Moreover, with the integrated design, the vehicle frame and the battery box frame are combined into one, reducing the number of components, making the entire structure more compact and lightweight, reducing the vehicle body weight, improving the load-bearing capacity of the vehicle body and the battery loading capacity, and increasing the strength, flexural rigidity, and torsional rigidity of the entire vehicle frame and the battery box frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of the integrated new energy vehicle frame provided by the embodiment of the present invention;

[0027] Figure 2It is a schematic diagram of the I-shaped structure of the battery box frame provided by the embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of two symmetrically arranged fixing parts of the battery box frame provided by the embodiment of the present invention;

[0029] Figure 4 It is a schematic diagram of the connection between the first main beam, the second main beam and the I-shaped structure provided by the embodiment of the present invention;

[0030] Figure 5 It is a schematic diagram of the battery box frame provided by the embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the end plate connecting piece provided by the embodiment of the present invention.

[0032] In the figure:

[0033] 1 - First main beam; 11 - First channel beam;

[0034] 2 - Second main beam; 21 - Second channel beam;

[0035] 3 - Battery box frame; 31 - I-shaped combined structure; 311 - Central shaft member; 3111 - Upper box beam; 3112 - Middle box beam; 3113 - Lower channel beam; 3114 - I-beam reinforcing rib;

[0036] 312 - Fixing part; 3120 - Fixed plate body; 3121 - Reinforcing rib; 3122 - Assembly cross beam; 31221 - Insertion slot; 3123 - Reinforcing rib plate; 32 - Load-bearing main structure; 321 - Longitudinal load-bearing plate; 322 - Transverse load-bearing plate;

[0037] 3231 - Longitudinal convex rib; 3232 - Transverse convex rib; 324 - End plate connecting piece; 3241 - Vertical connecting plate; 3242 - Horizontal connecting plate; 3243 - Connecting hole. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0039] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0042] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0043] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0045] Existing technical solutions and their disadvantages:

[0046] 1. Truck Frame Structure and Battery Layout: The frame design of traditional heavy trucks focuses on load-bearing and power transmission to ensure vehicle stability and safety. The battery pack is usually arranged behind the cab to avoid occupying the cargo box space, thus maintaining sufficient cargo loading capacity. However, this layout sacrifices some cargo space, resulting in limited transportation capacity and uneven load distribution, which may affect the vehicle's handling and stability.

[0047] 2. Influence of Battery Pack Layout: The battery pack is located at a specific position on the frame. Although it is beneficial to avoid direct contact with the cockpit, the torsion or bending of the frame may have an adverse effect on the battery pack, affecting its service life and safety. In addition, this layout may also limit the utilization rate of the battery space, affecting the driving range of electric trucks.

[0048] 3. Limitations of the Split Structure: In some new energy heavy trucks, the battery box frame and the frame adopt a split design to reduce the risk of damage to the battery pack caused by frame torsion. However, such a design often sacrifices the stiffness and strength of the frame, reduces the load-bearing capacity and stability, and at the same time increases the problem of battery space utilization rate and reduces the positive contribution to the driving range. In addition, the complex structure design also increases the production cost and assembly complexity, which is not conducive to large-scale production and efficient manufacturing.

[0049] Currently, with the wide application of electric vehicle technology in the field of heavy trucks, how to meet the environmental protection requirements while solving the problems of performance, space utilization and manufacturing efficiency brought by existing technical solutions has become a key challenge in promoting the development of the new energy heavy truck industry. Therefore, developing a new type of frame and battery box frame structure that can effectively improve the bending and torsion stiffness of the frame, optimize the battery space layout, and simplify the production and assembly process has become a technical topic of common concern inside and outside the industry. Such a solution can not only enhance the performance and competitiveness of electric heavy trucks, but also promote the green transformation and sustainable development of the entire automotive industry.

[0050] Example 1

[0051] In summary, the purpose of this embodiment is to propose an integrated new energy vehicle frame for the problems of insufficient load-bearing capacity and overall stability of existing electric heavy trucks (as above), such as Figures 1-6 shown, which includes: a first main beam 1, a second main beam 2, and a battery box frame 3 disposed between the first main beam 1 and the second main beam 2; the lengths of the first main beam 1 and the second main beam 2 are the same and are longitudinal, and the opposite ends of the battery box frame 3 are respectively fixedly connected to the first main beam 1 and the second main beam 2.

[0052] The battery box frame 3 includes an I-shaped combined structure 31 and two load-bearing main structures 32. The opposite ends of the I-shaped combined structure 31 are respectively fixedly connected to the first main beam 1 and the second main beam 2.

[0053] The I-shaped combined structure 31 has two U-shaped grooves, and after its actual installation, the openings of the U-shaped grooves face left or right (the horizontal direction is the left-right direction). The two load-bearing main structures 32 are symmetrically arranged at the openings of the U-shaped grooves on both sides of the I-shaped combined structure 31. After the load-bearing main structure 32 is connected to the I-shaped combined structure 31, it encloses the battery box frame 3 in the shape of a Chinese character 'Ri'. That is, in the horizontal direction, the two load-bearing main structures 32 are symmetrically arranged on both sides of the I-shaped combined structure 31 to surround the openings of the U-shaped grooves on both sides of the I-shaped combined structure 31. Through the above design, the high bending resistance and bearing capacity of the I-shaped combined structure 31 are reasonably utilized. By conducting the load of the battery box frame 3 to the first main beam 1 and the second main beam 2, it is ensured that the service load distribution is reasonable. A single I-shaped combined structure 31 is adopted inside, which ensures sufficient space for accommodating the battery cells inside the battery box frame 3 on the premise of effective load-bearing, and improves the space utilization rate of the battery box frame 3 and the energy / weight ratio of the battery box frame 3.

[0054] Specifically, the I-shaped combined structure 31 at least includes one central shaft member 311 and two fixing members 312. The length direction of the central shaft member 311 is the longitudinal direction. The two fixing members 312 are symmetrically arranged at the opposite ends of the central shaft member 311, and the central shaft member 311 is perpendicular to the fixing members 312.

[0055] In this embodiment, the I-shaped combined structure 31 includes one central shaft member 311 and two fixing members 312. The I-shaped combined structure 31 is an integrally combined I-shaped beam. The central shaft member 311 includes an upper box-shaped beam 3111, a middle box-shaped beam 3112, and a lower trough-shaped beam 3113 connected in sequence from top to bottom. The upper part of the central shaft member 311 is the upper box-shaped beam 3111, the middle part of the central shaft member 311 is the middle box-shaped beam 3112, and the lower part of the central shaft member 311 is the lower trough-shaped beam 3113. Several I-shaped beam stiffeners 3114 are respectively arranged on both sides of the I-shaped combined structure 31. The internal space of the I-shaped combined structure 31 is used to accommodate power cables and water-cooling pipelines. For example, the internal space of the upper box-shaped beam 3111 can be used to accommodate power cables and water-cooling pipelines. The hollow structure in the middle is the middle box-shaped beam 3112, which reduces its own weight on the premise of ensuring bending resistance and bearing capacity. The lower trough-shaped beam 3113 is used to connect with the lower cover. The combined I-shaped beam stiffeners 3114 can improve the bending resistance of the I-shaped combined structure 31 and are used to connect the battery cell cooling plates at the same time. A group of I-shaped beam stiffeners 3114 are symmetrically arranged on both sides of the upper part of the middle box-shaped beam 3112, and a group of I-shaped beam stiffeners 3114 are also symmetrically arranged on both sides of the lower part of the middle box-shaped beam 3112 to improve the structural strength.

[0056] The fixing member 312 includes a fixing plate body 3120 and reinforcing ribs 3121. The central shaft member 311 is connected to one side surface of the fixing plate body 3120, and a plurality of reinforcing ribs 3121 are arranged at the corners of the central shaft member 311 and the fixing plate body 3120. Preferably, the reinforcing ribs 3121 are in the shape of triangular blocks, and the middle part of the reinforcing ribs 3121 can be hollowed out to reduce the self-weight while improving the structural strength. As Figure 3 shown, for the fixing member 312 of the battery box body frame 3, the fixing member 312 is integrally cast, reducing the number of parts and improving the reliability. The two fixing members 312 are symmetrically arranged, and bolt connection holes are arranged on their sides for bolt connection with the load-bearing main structure 32. A plurality of reinforcing ribs 3121 are arranged on the fixing member 312, which can improve the bending and torsion resistance and fracture resistance of the fixing member 312, and effectively transfer the battery box body frame 3 to the outside.

[0057] In this embodiment, as Figure 4 shown, the triangular reinforcing ribs 3121 of the fixing member 312 of the battery box body frame 3 are bolt-connected to the central shaft member 311. Reinforcing ribs 3121 are respectively arranged at the two ends of the upper box-shaped beam 3111 of the central shaft member 311 and the corners of the fixing plate, and reinforcing ribs 3121 are also respectively arranged at the two ends of the lower trough-shaped beam 3113 and the corners of the fixing plate, improving the connection strength between the central shaft member 311 and the fixing plate and the overall structural strength. The central shaft member 311 is effectively limited and constrained by the way of clamping from above and below (that is, reinforcing ribs 3121 are arranged both above and below the central shaft member 311). The triangular reinforcing ribs 3121 improve the reliability of the connection part and reduce the possibility of connection failure caused by vibration and bending.

[0058] The first main beam 1 includes at least two first channel beams 11, and the second main beam 2 includes at least two second channel beams 21; the fixing member 312 further includes an assembly cross beam 3122. The assembly cross beam 3122 is arranged on the other side surface of the fixing plate body 3120, and the function of the assembly cross beam 3122 is to connect the first main beam 1 or the second main beam 2. At least two insertion slots 31221 are longitudinally formed on the assembly cross beam 3122. The first channel beam 11 and the second channel beam 21 are respectively inserted into the insertion slots 31221 of the two fixing members 312 and fixedly connected to the assembly cross beam 3122. For the convenience of distinction, the assembly cross beams 3122 of the two fixing members 312 are respectively the first assembly cross beam 3122 and the second assembly cross beam 3122. The first assembly cross beam 3122 is located at one end of the first main beam 1, and the second assembly cross beam 3122 is located at one end of the second main beam 2. The number of insertion holes on the assembly cross beam 3122 is greater than the number of the first channel beams 11 or the second channel beams 21. It is necessary to ensure that all the first channel beams 11 of the first main beam 1 are correspondingly inserted into the insertion holes of the first assembly cross beam 3122, and all the second channel beams 21 of the second main beam 2 are correspondingly inserted into the insertion holes of the second assembly cross beam 3122.

[0059] Preferably, the cross-sectional shape of the insertion slot 31221 is the same as that of the first channel beam 11 or the second channel beam 21; since the cross-section of the first channel beam 11 or the second channel beam 21 is C-shaped, the cross-section of the insertion hole is also C-shaped. After the first channel beam 11 is correspondingly inserted into the insertion hole of the first assembly cross beam 3122, it can be further bolt-fixed by a plurality of bolt assemblies. After the second channel beam 21 is correspondingly inserted into the insertion hole of the second assembly cross beam 3122, it can also be further bolt-fixed by a plurality of bolt assemblies.

[0060] The first main beam 1 includes two first channel beams 11 symmetrically arranged with respect to the central shaft member 311, and the second main beam 2 includes two second channel beams 21 symmetrically arranged with respect to the central shaft member 311. The assembly cross beam 3122 is arranged in the middle of the fixing plate body 3120, and the assembly cross beam 3122 is an axisymmetric structure with respect to the central shaft member 311. Two insertion slots 31221 are symmetrically formed at both ends of the assembly cross beam 3122. A plurality of reinforcing rib plates 3123 are also arranged at the corners of the assembly cross beam 3122 and the fixing plate body 3120 to improve the connection strength between the assembly cross beam 3122 and the fixing plate and the overall structural strength. Equivalently, the assembly cross beam 3122 is clamped between the reinforcing rib plates 3123 on both sides, and can effectively limit and constrain the first channel beam 11 or the second channel beam 21. Through the arrangement of the assembly cross beam 3122 and the reinforcing rib plates 3123, the reliability of its connection part is improved, the possibility of connection failure caused by vibration and bending is reduced, and it is ensured that the load of the battery box frame 3 is effectively and reasonably transmitted to the first main beam 1 and the second main beam 2.

[0061] In this embodiment, the load-bearing main structure 32 is U-shaped. The load-bearing main structure 32 includes a longitudinal load-bearing plate 321 and two transverse load-bearing plates 322 arranged at both ends of the longitudinal load-bearing plate 321. The two transverse load-bearing plates 322 are respectively fixedly connected to the two fixing members 312 by bolts. And the U-shaped cavity of the load-bearing main structure 32 is arranged opposite to and communicated with the U-shaped groove of the I-shaped combined structure 31 to form a rectangular accommodation space. The length of the longitudinal load-bearing plate 321 is greater than that of the transverse load-bearing plates 322. The longitudinal load-bearing plate 321, the transverse load-bearing plates 322 and the fixing members 312 jointly enclose the accommodation space, and the accommodation space is used for installing the battery cell module (battery pack) and the water-cooling plate.

[0062] The battery box frame 3 plays a crucial role in the battery system, and its main functions can be summarized as follows:

[0063] 1. Structural support: The frame provides a solid basic structure to ensure that the battery pack can withstand various mechanical stresses during use, such as extrusion, collision, etc., thereby protecting the internal battery cells from damage.

[0064] 2. Thermal management: The design and material selection of the frame are crucial for the thermal management of the battery system. Good thermal management can prevent the battery from overheating, improve battery performance and service life. Some frames may have thermal conductivity to help the heat dissipate quickly; or are designed with heat dissipation holes or fans to promote air circulation.

[0065] 3. Safety protection: The frame can enhance the safety of the battery pack, including preventing short circuits, preventing physical damage to the battery cells by external objects, and providing additional protection in case of failures. Some frames may also integrate safety devices such as gas discharge valves or fire alarm detection systems.

[0066] 4. Encapsulation and protection: The frame provides the encapsulation of the battery pack to protect the battery cells from environmental factors (such as moisture, chemicals, dust, etc.), and extends the overall life of the battery pack.

[0067] 5. Electrical connection: The frame usually contains necessary electrical connection components inside or around it, which are used to connect the battery cells to form a complete circuit, and also facilitate the connection to external chargers or other devices.

[0068] 6. Standardization and compatibility: The design of the frame usually follows certain industry standards or specifications to ensure the compatibility of the battery pack with other components (such as charging stations, vehicles, etc.), which is convenient for production and integration.

[0069] 7. Weight and cost: When designing the frame, it is necessary to consider the balance between its weight and cost. It is necessary to minimize the weight under the premise of ensuring structural strength and functions, and at the same time control the production cost.

[0070] In summary, the battery box frame 3 is an essential part of the battery system, and its design and manufacturing directly affect the performance, safety, reliability, and economy of the battery pack.

[0071] In this embodiment, several longitudinal ribs 3231 are provided on the inner side of the longitudinal load-bearing plate 321 to improve its structural strength, and several transverse ribs 3232 are provided on the inner side of the transverse load-bearing plate 322 to improve its structural strength.

[0072] The longitudinal load-bearing plate 321 and the transverse load-bearing plate 322 are fixedly connected by an end plate connecting member 324. At least one connecting hole 3243 for connecting the carriage is respectively opened at the top and bottom of the end plate connecting member 324. The end plate connecting member 324 includes two vertically connecting plates 3241 and two horizontally connecting plates 3242 formed integrally. The two vertically connecting plates 3241 are in a right-angle shape and are respectively bolted and fixed to the longitudinal load-bearing plate 321 and the transverse load-bearing plate 322. Horizontally connecting plates 3242 are respectively arranged at the top and bottom of the two vertically connecting plates 3241. While improving the connection strength, due to the design of the connecting hole 3243, the horizontally connecting plates 3242 can also be bolted and fixed to the carriage, providing expandability for the selection of carriages based on different working conditions.

[0073] The transverse load-bearing plate 322 is fixedly connected to the fixing member 312 by bolts, the transverse load-bearing plate 322 is fixedly connected to the end plate connecting member 324 by bolts, and the end plate connecting member 324 is fixedly connected to the longitudinal load-bearing plate 321 by bolts. Through the above design, the overall bending and torsion resistance of the frame load-bearing main structure 32 can be improved, the load of the battery cells can be reasonably distributed, and at the same time, the damage of the battery cells caused by external collisions can be reduced.

[0074] Based on the structure of this application, the following is summarized:

[0075] 1. Central shaft member 311: The internal channel of its upper box girder 3111 can be used to place power cables and water-cooling pipelines (for wire routing); the middle part is a hollow box girder, which not only ensures the structural strength but also reduces the weight; the lower part is a channel girder, which is convenient for connecting with bottom components; the central shaft member 311 is also provided with I-beam stiffeners 3114 to further enhance the bending resistance.

[0076] 2. Fixing member 312: It is integrally cast and formed, with multiple rib plates inside to improve the bending and torsion resistance performance. It is connected to the central shaft member 311 by bolts to ensure the structural stability and reliability.

[0077] 3. Frame load-bearing main structure 32: It is composed of a longitudinal load-bearing plate 321 and a transverse load-bearing plate 322, forming a space for placing batteries, with internal ribs to increase the strength, and is connected to the carriage through an end plate connecting member 324.

[0078] 4. Main beam connection: The first main beam 1 and the second main beam 2 are connected to the I-shaped composite structure 31 through the fixing parts 312, ensuring the stability of the entire structure. The main beam is designed as a channel beam and is connected to the fixing parts 312 by bolts, ensuring that the load of the battery box frame 3 can be evenly distributed on the main beam.

[0079] Technical effects: The number of connecting parts is reduced, thereby reducing the weight of the entire structure, improving the load-carrying capacity of the truck and the battery loading capacity, and increasing the strength, flexural stiffness and torsional stiffness of the entire vehicle frame and the battery box frame 3. Through the integrated design, combined with innovative connection structures and strengthening measures, this application significantly improves the performance and durability of new energy trucks, providing new ideas and technical support for the design of future new energy heavy trucks.

[0080] Embodiment 2

[0081] This embodiment provides a new energy truck, including the integrated new energy vehicle frame described above.

[0082] The beneficial effects of the technical solution of the present invention are:

[0083] This application discloses a vehicle frame structure with an integrated design of a new energy truck vehicle frame and a battery box frame 3. The I-shaped composite structure 31 is located between the load-bearing main body structures 32 on both sides. The first main beam 1 and the second main beam 2 are respectively fixedly connected to both ends of the I-shaped composite structure 31. By reasonably designing the I-shaped composite structure 31, the first main beam 1, the second main beam 2 and the battery box frame 3 are fixedly connected, which can effectively reduce the number of connecting parts, reduce the self-weight of the integrated new energy truck and the battery box frame 3, improve the load-carrying capacity of the truck, increase the number of battery cells loaded, and improve the strength, flexural stiffness and torsional stiffness of the integrated new energy vehicle frame and the battery box frame 3.

[0084] It also has the following advantages:

[0085] 1. The integrated die-casting connection structure between the vehicle frame beam and the battery box frame 3 has high strength and improves the sealing performance of the battery frame;

[0086] 2. The two side longitudinal beams (i.e., the first main beam 1 and the second main beam 2) and the middle longitudinal beam (i.e., the battery box frame 3) realize the conversion of the force transmission direction from horizontal to vertical, improving the battery layout space and reducing the weight of the vehicle frame;

[0087] 3. The middle longitudinal beam (i.e., the battery box frame 3) can not only bear the load but also arrange the wiring, realizing the integration of the longitudinal beam functions and the optimized layout of the pipeline harness;

[0088] 4. The side plates of the aluminum alloy extrusion-type battery box frame 3 with reinforcing ribs realize the integration of the battery frame and the skin, increasing the battery layout space;

[0089] 5. Three-section frame structure (the first main beam 1, the battery box frame 3, and the second main beam 2), enabling modular assembly and customized expansion of battery capacity.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0091] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An integrated new energy vehicle frame, characterized in that It includes a first main beam (1), a second main beam (2), and a battery box frame (3) disposed between the first main beam (1) and the second main beam (2); The first main beam (1) and the second main beam (2) are in the same length direction and are longitudinal. The opposite ends of the battery box frame (3) are respectively fixedly connected to the first main beam (1) and the second main beam (2); The battery box frame (3) includes an I-shaped combined structure (31) and two load-bearing main body structures (32). The opposite ends of the I-shaped combined structure (31) are respectively fixedly connected to the first main beam (1) and the second main beam (2); The I-shaped combined structure (31) has two U-shaped grooves. The two load-bearing main body structures (32) are symmetrically disposed at the openings of the two U-shaped grooves on both sides of the I-shaped combined structure (31). After the load-bearing main body structure (32) is connected to the I-shaped combined structure (31), the battery box frame (3) in the shape of a Chinese character 'Ri' is formed; The I-shaped combined structure (31) at least includes a central shaft member (311) and two fixing members (312). The length direction of the central shaft member (311) is longitudinal. The two fixing members (312) are symmetrically disposed at the opposite ends of the central shaft member (311), and the central shaft member (311) is perpendicularly disposed to the fixing members (312); The I-shaped combined structure (31) is an integrally combined I-beam. The upper part of the central shaft member (311) is an upper box beam (3111), the middle part of the central shaft member (311) is a middle box beam (3112), the lower part of the central shaft member (311) is a lower trough-shaped beam (3113). A plurality of I-beam reinforcing ribs (3114) are respectively disposed on both sides of the I-shaped combined structure (31). The internal space of the I-shaped combined structure (31) is used to accommodate power cables and water-cooling pipelines; The fixing member (312) includes a fixing plate body (3120) and a reinforcing rib (3121). The central shaft member (311) is connected to one side surface of the fixing plate body (3120), and a plurality of reinforcing ribs (3121) are disposed at the corners of the central shaft member (311) and the fixing plate body (3120).

2. The integrated new energy vehicle frame according to claim 1, wherein, The first main beam (1) includes at least two first trough-shaped beams (11), and the second main beam (2) includes at least two second trough-shaped beams (21); The fixing member (312) further includes an assembly cross beam (3122). The assembly cross beam (3122) is disposed on the other side surface of the fixing plate body (3120). At least two insertion slots (31221) are longitudinally formed on the assembly cross beam (3122). The first trough-shaped beam (11) and the second trough-shaped beam (21) are respectively inserted into the insertion slots (31221) of the two fixing members (312) and are fixedly connected to the assembly cross beam (3122).

3. The integrated new energy vehicle frame according to claim 2, characterized in that, The cross-sectional shape of the insertion slot (31221) is the same as the cross-sectional shape of the first trough-shaped beam (11) or the second trough-shaped beam (21); The first main beam (1) includes two first channel beams (11) symmetrically arranged with respect to the central shaft member (311), the second main beam (2) includes two second channel beams (21) symmetrically arranged with respect to the central shaft member (311), the assembly cross beam (3122) is arranged in the middle of the fixed plate body (3120), and the assembly cross beam (3122) is an axisymmetric structure with respect to the central shaft member (311). Two plug slots (31221) are symmetrically opened at both ends of the assembly cross beam (3122), and a plurality of reinforcing rib plates (3123) are also arranged at the corners of the assembly cross beam (3122) and the fixed plate body (3120).

4. The integrated new energy vehicle frame according to claim 1, characterized in that, The load-bearing main body structure (32) is U-shaped. The load-bearing main body structure (32) includes a longitudinal load-bearing plate (321) and two transverse load-bearing plates (322) arranged at both ends of the longitudinal load-bearing plate (321). The two transverse load-bearing plates (322) are respectively fixedly connected to two fixing members (312), and the U-shaped cavity of the load-bearing main body structure (32) communicates with the U-shaped groove of the I-shaped combined structure (31) to form a rectangular accommodation space for installing a battery cell module and a water-cooled plate.

5. The integrated new energy vehicle frame according to claim 4, characterized in that, A plurality of longitudinal convex ribs (3231) are arranged on the inner side of the longitudinal load-bearing plate (321), and a plurality of transverse convex ribs (3232) are arranged on the inner side of the transverse load-bearing plate (322). The longitudinal load-bearing plate (321) and the transverse load-bearing plate (322) are fixedly connected through an end plate connecting member (324), and at least one connecting hole (3243) for connecting the carriage is opened at the top and bottom of the end plate connecting member (324).

6. A new energy truck, characterized in that, An integrated new energy vehicle frame according to any one of claims 1-5.

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