Heavy truck trailer frame and vehicle

Abstract

The present invention relates to the technical field of new energy vehicle structures, and more specifically, to a heavy-duty truck trailer frame and vehicle. The heavy-duty truck trailer frame includes: a frame body, a first connecting member, a side battery assembly and a center battery assembly; the frame body includes two longitudinal beams; the center battery assembly includes a center frame, and the center frame is arranged between the two longitudinal beams; the side battery assembly includes two side frames and a support beam symmetrically arranged on both sides of the frame body, the bottom end of the side frame is lower than the bottom end of the center frame, and the bottom ends of the two side frames are connected by the support beam; there are multiple first connecting members, and the first connecting member is a strip structure, and the first end of the first connecting member along the length direction passes through the longitudinal beam along the width direction of the longitudinal beam, and is fixedly connected to the center frame, and the second end of the first connecting member along the length direction is fixedly connected to the side frame. In this way, the problem of insufficient frame strength caused by the battery system being installed in the space between the longitudinal beams of the frame is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle structures, and in particular to a heavy truck trailer frame and a vehicle. Background Art

[0002] With the transformation of the global energy structure and increasingly stringent environmental regulations, new energy heavy-duty trucks have entered a golden period of rapid development. As the core component of new energy heavy-duty trucks, battery systems have received great attention in the industry.

[0003] New energy heavy-duty trucks have a large load capacity and need to be transported over long distances, so they require a battery system with a larger capacity. However, although some existing battery systems have solutions to install the battery on the frame, they can only be installed on both sides of the frame. This setting of the battery system capacity is difficult to meet the battery capacity requirements of new energy heavy-duty trucks, resulting in limited application scenarios. At present, the installation of the battery system of heavy-duty trucks cannot utilize the space between the longitudinal beams of the frame, and cross beams need to be set between the longitudinal beams of the frame to ensure the torsion and impact strength of the frame. Therefore, there is an inherent contradiction between the battery setting and meeting the frame strength, and there is currently a lack of effective technical solutions. Summary of the invention

[0004] In order to solve the problem of insufficient frame strength caused by installing a battery system in the space between frame longitudinal beams, the present invention provides a heavy truck trailer frame and a vehicle.

[0005] The first aspect of the present application provides a heavy-duty truck trailer frame, comprising: a frame body, a first connecting member, a side battery assembly and a central battery assembly; the frame body comprises two longitudinal beams extending in the length direction of the vehicle, the two longitudinal beams are arranged at intervals in the width direction of the vehicle, a battery fixing area is arranged in the middle of the frame body, and the side battery assembly and the central battery assembly are fixed to the battery fixing area; the central battery assembly comprises a central frame, and the central frame is arranged in a first spacing space between the two longitudinal beams; the side battery assembly comprises two side frames symmetrically arranged on both sides of the frame body and a support beam, the bottom end of the side frame is lower than the bottom end of the central frame, and the bottom ends of the two side frames are connected by the support beam; a plurality of first connecting members are provided, the first connecting members are strip structures, the first end of the first connecting member along the length direction passes through the longitudinal beam along the width direction of the longitudinal beam, and is fixedly connected to the central frame, and the second end of the first connecting member along the length direction is fixedly connected to the side frame, so that the side battery assembly and the central battery assembly are fixed to the frame body.

[0006] In some embodiments, a second spacing space is provided between the central battery assembly and the longitudinal beam, and the central battery assembly is connected to the first connecting member through an anti-collision component; the anti-collision component includes a shock-absorbing pad, the shock-absorbing pad includes a flexible portion made of elastic material, the first end of the shock-absorbing pad is connected to the first connecting member, and the second end of the shock-absorbing pad is connected to the central battery assembly.

[0007] In some embodiments, the central frame includes a first support column arranged in a vertical direction, a flange is provided on the upper part of the first support column, and the flange has a first connecting surface arranged downward; the shock-absorbing pad also includes a connecting portion, the connecting portion is arranged at the second end of the shock-absorbing pad, the connecting portion is made of a hard material and is integrated with the flexible portion; the connecting portion is provided with a second connecting surface arranged upward, and the first connecting surface can be attached to and supported on the second connecting surface.

[0008] In some embodiments, the anti-collision component also includes a second connecting member, which includes a fixed section and a supporting section connected in sequence. The fixed section can be attached to the side of the longitudinal beam facing the central battery assembly, and the supporting section is configured to gradually approach the central battery assembly during the process of extending downward, and the flexible portion is fixedly disposed on the supporting section.

[0009] In some embodiments, the heavy truck trailer frame also includes a side connector, which is configured to extend in a vertical direction, and is connected to the side battery assembly on both sides along the width direction. The middle portion of the side connector protrudes in a direction away from the side battery assembly, and the middle portion of the side connector is attached to the side of the longitudinal beam and is fixedly connected to the longitudinal beam through a first connector.

[0010] In some embodiments, the side frame includes a plurality of battery placement compartments, which are connected in sequence along the vertical direction; a plurality of load-bearing ring beams connected in sequence are arranged at the bottom of the battery placement compartment, and the load-bearing ring beams include a plurality of load-bearing beams and reinforcements. The plurality of load-bearing beams are connected in sequence to form a polygon, and the reinforcements include a connecting plate and two fixed flanges connected to the connecting plate, and the two fixed flanges can be respectively attached and fixed to two adjacent load-bearing beams.

[0011] In some embodiments, the side-mounted battery assembly further includes a skin component covering the outside of the side frame.

[0012] In some embodiments, the skin assembly includes an upper skin covering the upper side of the side frame and a side skin covering the side of the side frame; the upper skin and the side skin are both composed of a plurality of sub-skins.

[0013] In some embodiments, a support frame is provided on the lower side of the upper skin, and the upper side of the support frame is in contact with the lower side of the upper skin; the support frame includes a plurality of support rods, and the support rods form a grid structure, and the support rods include a support plate and a fixing part, and the support plate is fixed to the upper side of the fixing part, and the fixing part includes a fixing plate, and the fixing plate is provided with bolt holes for bolts to pass through, and the support plate is provided with avoidance holes corresponding to the bolt holes, and there is an avoidance gap between the support plate and the fixing plate, and the avoidance gap can accommodate the head of the bolt.

[0014] In some embodiments, the heavy truck trailer frame further includes a boarding handrail fixed to the upper side of the side frame away from the longitudinal beam; a boarding ladder is provided on the side of the side frame, corresponding to the lower side of the boarding handrail.

[0015] The second aspect of the present application also provides a vehicle, including the heavy truck trailer frame in the technical solution.

[0016] In order to solve the problem of insufficient frame strength caused by installing the battery system in the space between the frame longitudinal beams, the present invention has the following advantages:

[0017] The central battery assembly is fixed in the battery fixing area and forms the battery system of the vehicle with the side battery assembly, which increases the placement space of the battery pack and effectively increases the battery capacity under the condition of the same battery cell density. At the same time, the side frames arranged on both sides are connected as a whole by using the support beam in the side battery assembly. The support beam can transmit the force through the side frame and the longitudinal beam of the frame. When the vehicle is twisted, the support beam can play an anti-torsion role. The support beam can also transfer the force acting on the side frame on one side to the side frame arranged on the other side, effectively dispersing the force and reducing the single component. The forces applied to it ensure the structural integrity and enhance the torsion and impact resistance. In addition, the center frame and the side frames are connected by a first connecting piece that passes through the longitudinal beam. When the frame is subjected to torsion, the center frame itself plays an anti-torsion role while transmitting the force to the side frames. Combined with the setting of the support beam, the center frame and the side frames arranged on both sides realize an integrated through-frame assembly, which can jointly play an anti-torsion role. Therefore, even if the cross beam connected between the two longitudinal beams is reduced due to the setting of the center battery assembly, the heavy-duty truck trailer frame of the present application can still meet the torsional strength requirements of the frame and enhance the reliability of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural schematic diagram of a heavy truck trailer frame according to an embodiment is shown;

[0019] Figure 2 A schematic diagram of the installation structure of a first connecting member according to an embodiment is shown;

[0020] Figure 3 A schematic structural diagram of an anti-collision assembly according to an embodiment is shown;

[0021] Figure 4 A schematic diagram of the installation structure of an anti-collision component according to an embodiment is shown;

[0022] Figure 5 A schematic diagram of the structure of a side-mounted battery overall layer according to an embodiment is shown;

[0023] Figure 6 Shows Figure 5 The partial enlarged structure diagram of the middle A part;

[0024] Figure 7 A cross-sectional structural diagram of a side connecting member of an embodiment is shown;

[0025] Figure 8 Shows Figure 5 A partial enlarged structural diagram of the middle B part;

[0026] Fig. 9 A cross-sectional isometric view of a side frame of an embodiment is shown;

[0027] Fig.10 Shows Fig. 9 A partial enlarged structural diagram of part C in the middle.

[0028] Figure numerals: 10-frame body; 11-longitudinal beam; 12-cross beam; 20-side battery assembly; 21-side frame; 211-battery storage compartment; 212-load-bearing ring beam; 2121-load-bearing beam; 2122-reinforcement member; 22-support beam; 23-skin assembly; 231-upper skin; 232-side skin; 2311-sub-skin; 233-support frame; 2331-support rod; 23311-support Plate; 23312-fixed plate; 30-central battery assembly; 31-central frame; 311-first support column; 312-flange; 40-first connecting piece; 50-anti-collision component; 51-shock pad; 511-flexible part; 512-connecting part; 5121-second connecting surface; 52-second connecting piece; 521-fixed section; 522-supporting section; 60-side connecting piece; 70-boarding handrail; 80-boarding step. DETAILED DESCRIPTION

[0029] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0030] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0031] This embodiment discloses a heavy truck trailer frame, such as Figure 1-2As shown, the vehicle body 10 may include: a vehicle frame body 10, a first connecting member 40, a side battery assembly 20, and a center battery assembly 30; the vehicle frame body 10 includes two longitudinal beams 11 extending in the vehicle length direction, the two longitudinal beams 11 are arranged at intervals in the vehicle width direction, a battery fixing area is arranged in the middle of the vehicle frame body 10, and the side battery assembly 20 and the center battery assembly 30 are fixed in the battery fixing area; the center battery assembly 30 includes a center frame 31, and the center frame 31 is arranged in a first spacing space between the two longitudinal beams 11; the side battery assembly 20 includes two symmetrically arranged on the vehicle frame body The side frames 21 and the support beams 22 are on both sides of the body 10, the bottom ends of the side frames 21 are lower than the bottom ends of the middle frames 31, and the bottom ends of the two side frames 21 are connected by the support beams 22; a plurality of first connecting members 40 are provided, and the first connecting members 40 are strip structures. The first end of the first connecting member 40 along the length direction penetrates the longitudinal beam 11 along the width direction of the longitudinal beam 11 and is fixedly connected to the middle frame 31, and the second end of the first connecting member 40 along the length direction is fixedly connected to the side frames 21, so that the side battery assembly 20 and the middle battery assembly 30 are fixed on the frame body 10.

[0032] In the above technical solution, the central battery assembly 30 is fixed in the battery fixing area and forms a battery system of the vehicle with the side battery assembly 20, which increases the placement space of the battery pack and effectively increases the battery capacity under the condition of the same battery cell density; at the same time, the side frames 21 arranged on both sides are connected as a whole by using the support beam 22 in the side battery assembly 20, and the support beam 22 can transmit the force with the longitudinal beam 11 of the frame through the side frame 21. When the vehicle is twisted, the support beam 22 can play an anti-torsion role, and the support beam 22 can also transfer the force acting on the side frame 21 on one side to the side frame 21 arranged on the other side, so as to effectively disperse the force and reduce the unit The forces exerted on each component can ensure the structural integrity and improve the torsion resistance and impact resistance. In addition, the center frame 31 and the side frames 21 are connected by a first connecting piece 40 that passes through the longitudinal beam 11. When the frame is subjected to torsion, the center frame 31 itself plays an anti-torsion role while transferring the force to the side frames 21. Combined with the setting of the support beam 22, the center frame 31 and the side frames 21 arranged on both sides realize an integrated through-frame assembly, which can jointly play an anti-torsion role. Therefore, even if the cross beam 12 connected between the two longitudinal beams 11 is reduced due to the setting of the center battery assembly 30, the heavy-duty truck trailer frame of the present application can still meet the torsional strength requirements of the frame and improve the reliability of the whole vehicle.

[0033] It should be noted that the above scheme is mainly applied to the trailer part of heavy trucks. Unlike family cars, heavy trucks have a huge demand for battery capacity compared to ordinary family cars, and due to significant differences in the body structure, the frame of a heavy truck is a certain distance from the ground. Therefore, this distance can be used to allow the lower edges of the side battery assembly 20 and the center battery assembly 30 to extend a longer distance from under the frame to increase the space for placing the battery pack. Compared with the technical solution of setting the crossbeam 12 in the battery fixing area in the existing solution, the above solution cancels the crossbeam 12 in the battery fixing area, so the central battery assembly 30 can be installed from the top by hoisting. Since the battery pack is usually heavy, and for the convenience and reliability of installation, the battery pack is pre-installed in the central frame 31. At this time, the central battery assembly 30 is heavy, and the height of the frame from the ground is low. It is not convenient to install it from below, and it is difficult to control. Therefore, it is more convenient to hoist the central battery assembly 30 from the top to the battery installation position. After it is hoisted into place by a crane, the staff can perform the fixed connection operation with the frame. The process is simple and efficient, and the operation space is large, which is convenient for the staff to operate. In the prior art, the battery system can be installed to the rear of the cab by hoisting. Therefore, the above solution of this application can use the existing production equipment to reduce the additional equipment cost.

[0034] The side battery assembly 20 and the center battery assembly 30 are respectively provided with battery packs, and the battery packs include battery cells for storing electricity. The side battery assembly 20 and the multiple battery packs in the center battery assembly 30 together constitute a battery system for powering the vehicle. The center frame 31 provided in the center battery assembly 30 and the side frame 21 provided in the side battery assembly 20 both provide fixation and support for the battery packs. Therefore, the center frame 31 and the side frame 21 can both adopt a similar "cage" structure, which are interconnected by a rod-like structure to form a frame structure wrapped around the outside of the battery pack. The battery pack can be fixed on the above-mentioned frame structure. Such a frame structure can ensure high strength while reducing weight. Specifically, the rod-like structure can be made of profiles, such as I-beams, square steels, etc. The longitudinal beam 11 in the frame body 10 is the main force-bearing structure of the frame, and a structure similar to that in the prior art can be adopted, and a cross beam 12 can be arranged outside the battery fixing area to ensure the torsion resistance of the vehicle. Specifically, a cross beam 12 can be arranged at both ends of the battery fixing area, and the cross beam 12 is used to define the position of the battery fixing area. Among them, the first connecting member 40 can adopt an appropriate implementation method, specifically, standard parts such as bolt groups, fixing pins, etc. can be selected, and non-standard customized parts with similar structures or functions can also be selected. Figure 1 to Figure 2As shown, bolts are exemplarily used as an implementation method, the bolts cooperate with nuts, the bolts pass through the longitudinal beam 11, one end of the bolts fixes the middle frame 31 to the longitudinal beam 11, and the other end fixes the side frame 21 to the longitudinal beam 11. The bolts simultaneously connect the middle frame 31 and the side frame 21, and also fix the two to the longitudinal beam 11. Multiple support beams 22 can be provided, and they are arranged in sequence along the length direction of the vehicle. The provision of multiple support beams 22 can further enhance the conduction effect of the force and enhance the torsion resistance of the frame.

[0035] When the vehicle is twisted due to external force, the spacing between the longitudinal beams 11 of the frame will change. This change will not have much impact on the side frames 21 arranged on both sides of the frame body 10, but the middle frame 31 located in the first spacing space between the two longitudinal beams 11 will be squeezed or stretched, not only the middle frame 31 is prone to structural damage, but also the torsion resistance of the vehicle will be reduced. For this reason, if Figure 3 , Figure 4 As shown, a second spacing space is provided between the central battery assembly 30 and the longitudinal beam 11, and the central battery assembly 30 is connected to the first connecting member 40 through an anti-collision component 50; the anti-collision component 50 includes a shock-absorbing pad 51, and the shock-absorbing pad 51 includes a flexible portion 511 made of elastic material, a first end of the shock-absorbing pad 51 is connected to the first connecting member 40, and a second end of the shock-absorbing pad 51 is connected to the central battery assembly 30.

[0036] The second spacing space is the space between the two sides of the center frame 31 and the longitudinal beams 11. The flexible portion 511 is made of elastic material, which can be rubber, nylon or other materials, or elastic composite materials composed of rubber and metal. By setting the flexible portion 511 in the shock-absorbing pad 51, when the vehicle is twisted, the distance between the two longitudinal beams 11 changes, and the flexible portion 511 will be squeezed or stretched first instead of being directly squeezed to the center frame 31. The elasticity of the flexible portion 511 can restore its shape after the force applied to it disappears. The combined effect of the shock-absorbing pad 51 and the second spacing space can protect the center frame 31, and when the vehicle is slightly twisted, the frame will not be structurally damaged due to external force, so as to further ensure the stability of the battery pack.

[0037] In order to further facilitate the installation and fixing of the middle frame 31, as shown in FIG. Figure 3 , Figure 4As shown, the central frame 31 includes a first support column 311 arranged in the vertical direction, and a flange 312 is arranged on the upper part of the first support column 311, and the flange 312 has a first connecting surface arranged facing downward; the shock-absorbing pad 51 also includes a connecting portion 512, and the connecting portion 512 is arranged at the second end of the shock-absorbing pad 51, and the connecting portion 512 is made of a hard material and is integrated with the flexible portion 511; the connecting portion 512 is provided with a second connecting surface 5121 arranged facing upward, and the first connecting surface can be attached to and supported on the second connecting surface 5121.

[0038] The connecting portion 512 is used to connect and fix the center frame 31. In order to facilitate the hoisting of the center frame 31, the shock-absorbing pad 51 can be connected to the longitudinal beam 11 first, and then the flange 312 of the center frame 31 can be dropped on the connecting portion 512 by hoisting, so that the first connecting surface and the second connecting surface 5121 are in contact. At this time, even if it is not fixed by bolts or other components, the center frame 31 can be placed on the shock-absorbing pad 51 more stably. After the placement is completed, the staff can install bolts or other fixing parts for tight fixing to fix the center frame 31 and the shock-absorbing pad 51. In addition, the shape and size of the first connecting surface and the second connecting surface 5121 can be set to be the same, and a structure for guiding and fixing can also be set on the second connecting surface 5121, so that the flange 312 can be more accurately dropped on the shock-absorbing pad 51, thereby improving the installation efficiency.

[0039] Since the upper and lower ends of the longitudinal beam 11 of the vehicle facing the first space are usually provided with structures similar to the flange 312, which will block the shock absorbing pad 51, in order to solve this problem, Figure 3 , Figure 4 As shown, the anti-collision component 50 also includes a second connecting member 52, which includes a fixed segment 521 and a supporting segment 522 connected in sequence. The fixed segment 521 can be attached to the side of the longitudinal beam 11 facing the central battery assembly 30, and the supporting segment 522 is configured to gradually approach the central battery assembly 30 during the process of extending downward, and the flexible portion 511 is fixedly disposed on the supporting segment 522.

[0040] The second connecting member 52 is Figure 3 , Figure 4As shown, in the process of extending downward, it gradually approaches the central battery assembly 30, avoiding the flange 312 structure of the longitudinal beam 11 on the one hand, and allowing its upper side to extend from the flange 312 structure of the longitudinal beam 11 on the other hand, and being used to fix the shock-absorbing pad 51, so that the connecting portion 512 of the shock-absorbing pad 51 can be free from obstruction, and the downward tilting design can reduce the occupation of the horizontal space, avoid excessive squeezing of the volume of the central frame 31, and also enable the shock-absorbing pad 51 installed thereon to have a longer length, increase the volume of the flexible portion 511, and improve the shock-absorbing performance. As an embodiment, the second connecting member 52 can be set as an integrated structure with the shock-absorbing pad 51 to reduce the number of components and facilitate installation.

[0041] To strengthen the connection strength between the side frame 21 and the longitudinal beam 11, Figure 5 , Figure 6 As shown, the heavy truck trailer frame also includes a side connector 60, which is configured to extend in the vertical direction. The side connector 60 is connected to the side battery assembly 20 on both sides along the width direction. The middle part of the side connector 60 protrudes in the direction away from the side battery assembly 20. The middle part of the side connector 60 is attached to the side of the longitudinal beam 11 and is fixedly connected to the longitudinal beam 11 through the first connector 40.

[0042] The side connecting member 60 can be a longer length while serving as a connecting structure, so that it can also serve as a part of the side frame 21, replacing a part of the vertically arranged supporting structure of the side frame 21, thereby improving the utilization rate of parts and reducing materials. Figure 6 , Figure 7 The middle portion of the side connector 60 shown is protruding away from the side battery assembly 20, which can provide better structural strength than the ordinary plate-like structure under the condition of the same material. The protruding portion of the side connector 60 can be provided with a hollow hole to reduce the weight of the component. Figure 7 As shown, the width of the side connecting member 60 is L, the width of the two side parts is L1, and L1 is approximately equal to L / 4; the height of the middle raised part is h, and L / h≥3; the side connecting member 60 can be made of a plate with uniform thickness, and a plate with a thickness of d can be selected, and the radius R1 of the transition arc between the middle raised part and the two side parts can be set to d<R1<2d.

[0043] As a specific implementation method, Figure 5 , Figure 6 , Fig. 9 , Fig.10As shown, the side frame 21 includes a plurality of battery placement compartments 211, and the plurality of battery placement compartments 211 are connected in sequence along the vertical direction; a plurality of load-bearing ring beams 212 connected in sequence are arranged at the bottom of the battery placement compartment 211, and the load-bearing ring beams 212 include a plurality of load-bearing beams 2121 and reinforcements 2122, and the plurality of load-bearing beams 2121 are connected in sequence to form a polygon, and the reinforcements 2122 include a connecting plate and two fixed flanges 312 connected to the connecting plate, and the two fixed flanges 312 can be respectively attached and fixed to two adjacent load-bearing beams 2121.

[0044] The provision of the reinforcement member 2122 can effectively enhance the connection strength of the adjacent load-bearing beam 2121, so as to enhance the bearing capacity of the load-bearing ring beam 212 while using less material.

[0045] The central battery assembly 30 and the side battery assembly 20 may adopt similar structural designs, especially in terms of the skin and frame structure designs. For the convenience of description, the implementation method of the side battery assembly 20 is used as an example below, and its implementation method can also be used for the central battery assembly 30.

[0046] As an implementation method, in order to protect the battery pack disposed in the side frame 21, it plays a role of dustproof and waterproof. Figure 5 As shown, the side-mounted battery assembly 20 also includes a skin component 23 covering the outside of the side frame 21 .

[0047] The skin assembly 23 can cover the outside of the side frame 21, or can be installed and protected by filling the gap on the side frame 21. It is only necessary to make the space inside the side frame 21 for installing the battery pack closed to achieve the purpose of dustproof and waterproof. Figure 5 As shown, taking the side frame 21 disposed on the left side of the vehicle as an example, its upper part and left side are covered with skin, and these two sides are the main sides that are subjected to impact, force, etc., and the front side, rear side and lower side are all covered with embedded skin, and the internal space is closed by filling the gap on the side frame 21. Similarly, in the middle frame 31, since only the upper side is the main force-bearing part, it is possible to choose to set a covering skin only on the upper side.

[0048] Since heavy trucks have a large number of battery packs, the side frames 21 and the center frame 31 are usually larger in size to accommodate these batteries. In the case of limited width, they can be longer. Such a structure also results in a larger total volume of the skin assembly 23 used for covering, and the skin assembly 23 is usually made of thinner metal plates to reduce weight. Such parts are relatively difficult to transport and install. Therefore, if Figure 5As shown, the skin assembly 23 includes an upper skin 231 covering the upper side of the side frame 21 and a side skin 232 covering the side of the side frame 21 ; the upper skin 231 and the side skin 232 are both composed of a plurality of sub-skins 2311 .

[0049] The skin assembly 23 is divided into an upper skin 231 and a side skin 232, so that each skin can be a relatively simple plate-like structure, which is convenient for transportation and installation. Since the side battery assemblies 20 arranged on both sides are symmetrically mirrored, the skin assembly 23 is actually also mirrored. However, by disassembling it into the upper skin 231 and the side skin 232, the parts can be universal. During production, it is only necessary to distinguish between the upper skin 231 and the side skin 232, and there is no need to distinguish between the left and right sides. Furthermore, in order to facilitate production, transportation and installation, the upper skin 231 and the side skin 232 can be further divided into multiple sub-skins 2311, thereby further reducing the volume of a single part. Specifically, it can be as follows Figure 5 As shown, it is divided into a plurality of sub-skins 2311 along the length direction. The sub-skins 2311 may be provided with slightly concave grooves, which can increase the strength of the skin and also play a certain decorative role.

[0050] As a trailer frame of a heavy truck, in some cases, such as loading cargo, when inspecting or repairing the load, the driver or staff will need to climb onto the frame, but the traditional frame lacks a suitable foothold, making the operation process more difficult. In the above solution, due to the provision of the central battery assembly 30 and the side battery assembly 20, it is not suitable for the staff to step on it directly without any treatment. In order to solve this problem, Figure 5 , Figure 8 As shown, a support frame 233 is provided on the lower side of the upper skin 231, and the upper side surface of the support frame 233 is attached to the lower side surface of the upper skin 231; the support frame 233 includes a plurality of support rods 2331, and the support rods 2331 form a grid structure, the support rods 2331 include a support plate 23311 and a fixing part, the support plate 23311 is fixed to the upper side of the fixing part, the fixing part includes a fixing plate 23312, the fixing plate 23312 is provided with bolt holes for bolts to pass through, the support plate 23311 is provided with avoidance holes corresponding to the bolt holes, and there is an avoidance gap between the support plate 23311 and the fixing plate 23312, and the avoidance gap can accommodate the head of the bolt.

[0051] The grid structure formed by the support frame 233 can provide a good support for the skin. As a preferred embodiment, the support rod 2331 may include a support plate 23311 and a fixing portion. The fixing portion is provided with a fixing plate 23312 for fixing with the side frame 21 below. Since bolts are usually used as fixing connectors, a spacing space is provided between the support plate 23311 and the fixing plate 23312 in the vertical direction. The spacing space is a spacing space. The spacing space can be used to accommodate the head of the bolt. When the bolt is installed, it will not protrude from the upper support plate 23311. Therefore, the upper skin 231 does not need to be provided with a spacing structure, and the support plates 23311 of the support frame 233 composed of multiple support rods 2331 can have the same horizontal height, which is convenient for installation. Specifically, the support rod 2331 can be directly processed from a square steel profile. The support rod 2331 can be directly formed by cutting off the other parts of one side of the square steel except the fixing portion. The cut-off part can reduce the weight of the support rod 2331.

[0052] In order to further facilitate the staff to climb onto the frame, Figure 1 As shown, the heavy truck trailer frame also includes a boarding handrail 70 fixed on the upper side of the side frame 21 away from the longitudinal beam 11; a boarding step 80 is provided on the side of the side frame 21, corresponding to the lower side of the boarding handrail 70. The boarding handrail 70 may be a circular ring structure, which is convenient for people to hold the boarding handrail 70 by hand to provide assistance. The boarding handrail 70 is fixed on the side frame 21. When the boarding handrail 70 is pulled, the force is directly transmitted to the side frame 21 to avoid damage to the relatively weak skin component 23. The boarding step 80 may be an independently installed component, or it may be a separately installed component. Figure 1 As shown, it is installed on the side of the side frame 21 and directly connected to the side frame 21, and an opening for the staff to insert their feet is set at the corresponding position of the skin component 23.

[0053] This embodiment discloses a vehicle, which may include the heavy-duty truck trailer frame in the above technical solution. The heavy-duty truck trailer frame is arranged and installed on the vehicle, and the heavy-duty truck trailer frame can improve the torsional rigidity and strength of the vehicle, and can also enable the heavy-duty truck trailer frame to effectively absorb collision energy, thereby improving the driving safety of the vehicle.

[0054] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A heavy truck trailer frame, characterized in that: The heavy truck trailer frame comprises: A vehicle frame body, a first connecting member, a side-mounted battery assembly, and a center-mounted battery assembly; The frame body includes two longitudinal beams extending in the length direction of the vehicle, the two longitudinal beams are arranged at intervals in the width direction of the vehicle, a battery fixing area is arranged in the middle of the frame body, and the side battery assembly and the middle battery assembly are fixed to the battery fixing area; The central battery assembly includes a central frame, and the central frame is arranged in a first spacing space between the two longitudinal beams; The side-mounted battery assembly includes two side frames and a support beam symmetrically arranged on both sides of the frame body, the bottom ends of the side frames are lower than the bottom end of the middle frame, and the bottom ends of the two side frames are connected by the support beam; A plurality of the first connecting members are provided, and the first connecting members are strip-shaped structures. A first end of the first connecting member along the length direction penetrates the longitudinal beam along the width direction of the longitudinal beam and is fixedly connected to the middle frame. A second end of the first connecting member along the length direction is fixedly connected to the side frame, so that the side battery assembly and the middle battery assembly are fixed to the frame body. A second spacing space is provided between the central battery assembly and the longitudinal beam, and the central battery assembly is connected to the first connecting member through an anti-collision component; The anti-collision component includes a shock absorbing pad, the shock absorbing pad includes a flexible portion made of elastic material, a first end of the shock absorbing pad is connected to the first connecting member, and a second end of the shock absorbing pad is connected to the central battery assembly; The middle frame includes a first support column arranged in a vertical direction, the upper portion of the first support column is provided with a flange, and the flange has a first connecting surface arranged downward; The shock-absorbing pad further comprises a connecting portion, which is arranged at the second end of the shock-absorbing pad, and is made of a hard material and is integrated with the flexible portion; The connecting portion is provided with a second connecting surface arranged upward, and the first connecting surface can be attached to and supported by the second connecting surface; The anti-collision component also includes a second connecting member, which includes a fixed section and a supporting section connected in sequence, the fixed section can be attached to the side of the longitudinal beam facing the central battery assembly, the supporting section is configured to gradually approach the central battery assembly during the process of extending downward, and the flexible portion is fixedly disposed on the supporting section.

2. A heavy truck trailer frame according to claim 1, characterized in that: The heavy truck trailer frame also includes a side connector, which is configured to extend in a vertical direction, and is connected to the side battery assembly on both sides along the width direction. The middle portion of the side connector protrudes in a direction away from the side battery assembly, and the middle portion of the side connector is attached to the side of the longitudinal beam and is fixedly connected to the longitudinal beam through the first connector.

3. A heavy truck trailer frame according to claim 1, characterized in that: The side frame includes a plurality of battery placement compartments, and the plurality of battery placement compartments are sequentially connected and arranged along the vertical direction; A plurality of load-bearing ring beams connected in sequence are arranged at the bottom of the battery placement compartment, and the load-bearing ring beams include a plurality of load-bearing beams and reinforcements. The plurality of load-bearing beams are connected in sequence to form a polygon, and the reinforcements include a connecting plate and two fixed flanges connected to the connecting plate, and the two fixed flanges can be respectively attached and fixed to two adjacent load-bearing beams.

4. A heavy truck trailer frame according to claim 1, characterized in that: The side-mounted battery assembly also includes a skin component covering the outside of the side frame.

5. A heavy truck trailer frame according to claim 4, characterized in that: The skin assembly includes an upper skin covering the upper side of the side frame and a side skin covering the side of the side frame; The upper skin and the side skin are both composed of a plurality of sub-skins.

6. A heavy truck trailer frame according to claim 5, characterized in that: A support frame is provided on the lower side of the upper skin, and the upper side of the support frame is attached to the lower side of the upper skin; The support frame includes a plurality of support rods, which form a grid structure. The support rods include a support plate and a fixing portion. The support plate is fixed to the upper side of the fixing portion. The fixing portion includes a fixing plate, and the fixing plate is provided with bolt holes for bolts to pass through. The support plate is provided with avoidance holes corresponding to the bolt holes. There is an avoidance gap between the support plate and the fixing plate, and the avoidance gap can accommodate the head of the bolt.

7. The heavy truck trailer frame according to claim 1, characterized in that: The heavy truck trailer frame also includes a boarding handrail fixed on the upper side of the side frame away from the longitudinal beam; A boarding step is arranged on the side of the side frame, corresponding to the lower part of the boarding handrail.

8. A vehicle, characterized in that: The heavy truck trailer frame comprises any one of claims 1 to 7.

Images