New energy truck
By designing a sunken section and a lower convex section in the cargo box structure of new energy freight vehicles, combined with U-shaped longitudinal beams and a composite suspension system, the problem of limited cargo box volume was solved, thereby improving loading capacity and dynamic stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-06
- Publication Date
- 2026-04-03
AI Technical Summary
Existing new energy freight trucks have limited cargo box volume, which prevents further improvement in loading capacity, and their dynamic stability is insufficient.
The design incorporates a lowered section in the longitudinal beams of the chassis, and the passenger compartment has a lowered section that is housed within the lowered section. Combined with the U-shaped longitudinal beams and the composite suspension system, this increases the passenger compartment volume and lowers the center of gravity.
It effectively increases cargo volume and improves loading capacity, while lowering the center of gravity and enhancing the dynamic stability of the truck.
Smart Images
Figure CN121778031A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of freight vehicle technology, and in particular to a new energy freight truck. Background Technology
[0002] New energy freight trucks are widely used in short-distance delivery and express delivery industries. With the rapid development of e-commerce and logistics, the market demand for the loading capacity of freight trucks is increasing. Existing new energy freight trucks typically use a straight-through frame, with the frame being flat overall, while the cargo box is generally a regular rectangular structure mounted on top of the frame. Due to the limitations in the overall dimensions of freight trucks, the cargo box cannot be further increased in volume by enlarging its dimensions, thus greatly limiting the loading capacity of freight trucks. Summary of the Invention
[0003] The purpose of this application is to provide a new energy freight vehicle that effectively increases the volume of the cargo compartment to enhance the loading capacity of the freight vehicle.
[0004] To achieve the above objectives, this application provides a new energy truck, comprising: a frame, the frame including two longitudinal beams, the two longitudinal beams being arranged opposite each other along the width direction of the frame; each longitudinal beam including a first horizontal section, a lower section and a second horizontal section fixedly connected sequentially from the front to the rear of the vehicle, the upper surface of the lower section being lower than the upper surfaces of the first horizontal section and the second horizontal section; The carriage includes a box body and a lower protrusion, the lower surface of the lower protrusion being lower than the lower surface of the box body, the box body being supported on the upper surface of the second horizontal section, and the lower protrusion being at least partially accommodated within the sunken section; A battery pack, which is connected to the second horizontal section and disposed on the lower surface of the vehicle frame.
[0005] Optionally, the sunken section includes a first vertical section, a third horizontal section, and a second vertical section that are fixedly connected in sequence. The two ends of the third horizontal section are respectively connected to the lower ends of the first vertical section and the second vertical section. The upper end of the first vertical section is connected to the first horizontal section, and the upper end of the second vertical section is connected to the second horizontal section.
[0006] Optionally, the length of the third horizontal segment is greater than the length of the second horizontal segment, and the length of the second horizontal segment is greater than the length of the first horizontal segment.
[0007] Optionally, the vertical distance L from the upper surface of the third horizontal segment to the upper surface of the second horizontal segment is 200-400mm.
[0008] Optionally, the cross-sectional shape of the first horizontal segment, the second horizontal segment, and the third horizontal segment along the width direction of the vehicle frame is U-shaped.
[0009] Optionally, the new energy truck further includes a rear suspension system, which includes a front support, a leaf spring, and an air spring; one end of the front support is connected to the second vertical section, the other end of the front support is hinged to the front end of the leaf spring, the rear end of the leaf spring is connected to the lower end of the air spring, and the upper end of the air spring is connected to the second horizontal section.
[0010] Optionally, the frame further includes multiple crossbeams, which are spaced apart; each crossbeam is connected to two longitudinal beams at both ends.
[0011] Optionally, the frame further includes a fixed bracket, through which the battery pack is connected to the second horizontal section.
[0012] Compared with the prior art, the beneficial effects of the new energy freight truck of this application embodiment are as follows: The new energy freight truck of this application is equipped with longitudinal beams, the longitudinal beams have a sunken section, and the truck body has a lower protrusion. The lower protrusion is at least partially accommodated in the sunken section, thereby effectively increasing the volume of the truck body and increasing the vehicle's loading capacity. At the same time, when the freight truck is carrying goods, some of the goods can be accommodated in the lower protrusion of the truck body, which lowers the center of gravity of the entire vehicle and improves the dynamic stability of the freight truck during driving.
[0013] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this application. Attached Figure Description
[0014] Figure 1 This is a structural schematic diagram of a new energy freight truck according to an embodiment of this application; Figure 2 This is a schematic diagram of the vehicle frame structure according to an embodiment of this application; Figure 3 This is a schematic diagram of the connection structure between the vehicle frame and the rear suspension system according to an embodiment of this application; Figure 4 yes Figure 3 Enlarged view of point A in the middle.
[0015] Figure label: 1. Frame; 11. Longitudinal beam; 111. First horizontal section; 112. Lower section; 1121. First vertical section; 1122. Third horizontal section; 1123. Second vertical section; 113. Second horizontal section; 12. Crossbeam; 13. Fixed bracket; 131. Lower frame; 132. Connecting plate; 2. Carriage box; 21. Box body; 22. Lower protrusion; 3. Battery pack; 4. Rear suspension system; 41. Front support; 42. Leaf spring; 43. Air spring; 5. Cab; 6. Rear axle. Detailed Implementation
[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0017] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.
[0018] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0019] See Figure 1 and Figure 2 As shown, a preferred embodiment of this application provides a new energy freight vehicle, which includes a frame 1, a cargo box 2, and a battery pack 3. The frame 1 includes two longitudinal beams 11, which are arranged opposite each other along the width direction of the frame. Each longitudinal beam 11 includes a first horizontal section 111, a recessed section 112, and a second horizontal section 113, which are sequentially fixedly connected from the front to the rear of the vehicle. The upper surface of the recessed section 112 is lower than the upper surfaces of the first horizontal section 111 and the second horizontal section 113. The cargo box 2 includes a body 21 and a lower protrusion 22. The lower surface of the lower protrusion 22 is lower than the lower surface of the body 21. The body 21 is supported on the upper surface of the second horizontal section 113, and the lower protrusion 22 is at least partially accommodated within the recessed section 112. Because the width of the frame 1 is smaller than the width of the cargo box 2, the lower protrusion 22 is only partially accommodated within the recessed section 112. The battery pack 3 is connected to the second horizontal section 113 and disposed on the lower surface of the frame 1. It is understandable that the battery pack 3 is connected to the second horizontal section 113 and located below the frame 1, that is, the battery pack 3 is arranged at the lower rear of the frame 1, leaving space in the lower middle of the frame 1, which creates conditions for the lower section 112 to be set in the middle of the frame 1 and to accommodate part of the carriage.
[0020] Based on the above technical solution, the longitudinal beam 11 is provided with a sunken section 112, and the carriage 2 is provided with a lower protrusion 22. The lower protrusion 22 is at least partially accommodated in the sunken section 112, thereby effectively increasing the volume of the carriage 2 and increasing the vehicle's loading capacity. At the same time, when the cargo truck is loaded, some of the goods can be accommodated in the lower protrusion 22 of the carriage 2, which lowers the center of gravity of the whole vehicle and improves the dynamic stability of the cargo truck during driving.
[0021] In some preferred embodiments of this application, such as Figure 1 and Figure 2 As shown, the sunken section 112 includes a first vertical section 1121, a third horizontal section 1122, and a second vertical section 1123, which are fixedly connected in sequence. The two ends of the third horizontal section 1122 are respectively connected to the lower ends of the first vertical section 1121 and the second vertical section 1123. The upper end of the first vertical section 1121 is connected to the first horizontal section 111, and the upper end of the second vertical section 1123 is connected to the second horizontal section 113. Preferably, a welded connection method is used to ensure the structural strength of the frame. Since both the first vertical section 1121 and the second vertical section 1123 are vertically arranged, compared to an inclined arrangement, the space that the sunken section 112 can accommodate for the lower protrusion 22 can be maximized, thereby maximizing the loading capacity of the truck.
[0022] In some preferred embodiments of this application, such as Figure 1 and Figure 2 As shown, the length of the third horizontal segment 1122 is greater than the length of the second horizontal segment 113, and the length of the second horizontal segment 113 is greater than the length of the first horizontal segment 111. The first horizontal segment 111 is located at the front of the truck and is mainly used to install components such as the front axle, cab 5, and steering system. Its length should be as small as possible while meeting installation requirements. The second horizontal segment 113 is located at the rear of the truck and is used to arrange components such as the rear axle 6, battery pack 3, and braking system. Its length should also be as small as possible while meeting the installation requirements of each component. The length of the third horizontal segment 1122 determines the volume of the lower protrusion 22 of the cargo box 2. Therefore, its length should be maximized within the allowable range to maximize the cargo box volume.
[0023] In some preferred embodiments of this application, such as Figure 1 and Figure 3As shown, the vertical distance L from the upper surface of the third horizontal segment 1122 to the upper surface of the second horizontal segment 113 is 200-400mm, which is the sinking depth of the lower segment. It can be understood that the greater the sinking depth, the larger the volume of the lower protrusion 22, and the stronger the loading capacity of the truck. However, it is also necessary to ensure that the lower segment 112 has sufficient ground clearance to avoid affecting the vehicle's passability. In this embodiment, the first horizontal segment 111 and the second horizontal segment 113 have the same height. Of course, depending on different design requirements, the first horizontal segment 111 can be lower or higher than the second horizontal segment 113, which is not limited here.
[0024] In some preferred embodiments of this application, such as Figure 2 As shown, the first horizontal segment 111, the second horizontal segment 113, and the third horizontal segment 1122 have a U-shaped cross-section along the width direction of the frame 1, which can be formed by roll forming or stamping. The U-shaped longitudinal beam has good lateral bending stiffness and torsional stiffness, and is also easy to process; the U-shaped longitudinal beam has a straight upper flange, which facilitates the installation of the cab 5 and the carriage 2. Preferably, the first vertical segment 1121 and the second vertical segment 1123 also have a U-shaped cross-section to further ensure the rigidity of the frame 1.
[0025] In some preferred embodiments of this application, such as Figure 3 and Figure 4 As shown, the new energy truck also includes a rear suspension system 4, which includes a front support 41, a leaf spring 42, and an air spring 43. One end of the front support 41 is fixedly connected to the second vertical section 1123, specifically by means of fasteners such as bolts. The other end of the front support 41 is provided with a pin, and the front end of the leaf spring 42 is provided with a lug, which is hinged to the pin, thus realizing the hinged connection between the front support 41 and the leaf spring 42. The rear end of the leaf spring 42 is connected to the lower end of the air spring 43, and the upper end of the air spring 43 is connected to the second horizontal section 113. This composite suspension system combines the advantages of the leaf spring 42 and the air spring 43, can withstand a large load, and has good ride comfort. At the same time, connecting the front support 41 to the second vertical section 1123 allows the rear suspension system 4 to be arranged more compactly, which not only reduces the manufacturing cost of the rear suspension system 4, but also saves space under the vehicle, allowing for a further increase in the length of the third horizontal section 1122, thereby increasing the volume of the cargo box 2.
[0026] In some preferred embodiments of this application, such as Figure 2 As shown, the frame 1 also includes multiple crossbeams 12, which are spaced apart; the two ends of each crossbeam 12 are respectively connected to two longitudinal beams 11. The two ends of the crossbeams 12 are fixed to the two longitudinal beams 11 by welding or bolting to enhance the torsional stiffness of the frame 1.
[0027] In some preferred embodiments of this application, such as Figure 1 and Figure 2 As shown, the vehicle frame 1 also includes a fixed bracket 13, and the battery pack 3 is connected to the second horizontal section 113 through the fixed bracket 13. Specifically, the fixed bracket 13 includes a lower frame 131 fixedly connected to the second horizontal section 113 and a plurality of connecting plates 132. Each connecting plate 132 is connected to the second horizontal section 113 by bolts. The battery pack 3 is disposed between the lower surface of the second horizontal section 113 and the lower frame 131, and is connected to the lower frame 131 by bolts for easy disassembly.
[0028] This application provides a preferred embodiment of a new energy freight truck, which, compared with the prior art: The new energy freight truck of this application has a recessed section on the longitudinal beam and a lowered protrusion on the cargo box. The lowered protrusion is at least partially accommodated in the recessed section, thereby effectively increasing the volume of the cargo box and increasing the vehicle's loading capacity. At the same time, when the freight truck is carrying cargo, some of the cargo can be accommodated in the lowered protrusion of the cargo box, which lowers the center of gravity of the entire vehicle and improves the dynamic stability of the freight truck during driving.
[0029] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.
Claims
1. A new energy freight truck, characterized in that, include: The frame (1) includes two longitudinal beams (11), which are arranged opposite to each other along the width direction of the frame (1); each longitudinal beam (11) includes a first horizontal section (111), a lower section (112), and a second horizontal section (113) that are fixedly connected from the front to the rear of the vehicle, and the upper surface of the lower section (112) is lower than the upper surfaces of the first horizontal section (111) and the second horizontal section (113); The carriage (2) includes a box body (21) and a lower protrusion (22), the lower surface of which is lower than the lower surface of the box body (21), the box body (21) is supported on the upper surface of the second horizontal section (113), and the lower protrusion (22) is at least partially accommodated within the sunken section (112). Battery pack (3), which is connected to the second horizontal section (113) and disposed on the lower surface of the frame (1).
2. The new energy freight truck as described in claim 1, characterized in that... The sunken section (112) includes a first vertical section (1121), a third horizontal section (1122), and a second vertical section (1123) that are fixedly connected in sequence. The two ends of the third horizontal section (1122) are respectively connected to the lower ends of the first vertical section (1121) and the second vertical section (1123). The upper end of the first vertical section (1121) is connected to the first horizontal section (111), and the upper end of the second vertical section (1123) is connected to the second horizontal section (113).
3. The new energy freight truck as described in claim 2, characterized in that... The length of the third horizontal segment (1122) is greater than the length of the second horizontal segment (113), and the length of the second horizontal segment (113) is greater than the length of the first horizontal segment (111).
4. The new energy freight truck as described in claim 2, characterized in that... The vertical distance L from the upper surface of the third horizontal segment (1122) to the upper surface of the second horizontal segment (113) is 200-400mm.
5. The new energy freight truck as described in claim 2, characterized in that... The cross-sectional shape of the first horizontal segment (111), the second horizontal segment (113) and the third horizontal segment (1122) along the width direction of the frame (1) is U-shaped.
6. The new energy freight truck as described in claim 2, characterized in that... The new energy truck also includes a rear suspension system (4), which includes a front support (41), a leaf spring (42), and an air spring (43). One end of the front support (41) is connected to the second vertical section (1123), and the other end of the front support (41) is hinged to the front end of the leaf spring (42). The rear end of the leaf spring (42) is connected to the lower end of the air spring (43). The upper end of the air spring (43) is connected to the second horizontal section (113).
7. The new energy freight vehicle as described in claim 1, characterized in that... The frame (1) also includes a plurality of crossbeams (12), which are spaced apart; the two ends of each crossbeam (12) are respectively connected to two longitudinal beams (11).
8. The new energy freight truck as described in claim 1, characterized in that... The frame (1) also includes a fixed bracket (13), and the battery pack (3) is connected to the second horizontal section (113) through the fixed bracket (13).