Semitrailer and goods vehicle

Abstract

The utility model provides a kind of semitrailer and freight vehicle, it includes: two longitudinal beams, heat management crossbeam and heat management device;Two longitudinal beams extend along the longitudinal direction horizontally, and two longitudinal beams are spaced apart along the lateral direction;Heat management crossbeam is set between two longitudinal beams, heat management crossbeam extends along the lateral direction horizontally, and the two ends of heat management crossbeam are respectively connected to the opposite sides of two longitudinal beams;The upper surface of heat management crossbeam and two longitudinal beams are enclosed to form a working space;Heat management device is set in working space, and the bottom of heat management device is connected to heat management crossbeam, and the top of heat management device is lower than the upper surface of longitudinal beam.One aspect, so that two longitudinal beams and heat management crossbeam can protect heat management device, avoid external sundries knock heat management device, guarantee the safety and reliability of heat management device;On the other hand, effectively improve the space utilization of semitrailer, realize the lightweight design of semitrailer.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a semi-trailer and freight vehicle. Background Technology

[0002] Electric vehicles are vehicles that use onboard batteries as their core energy source, converting electrical energy into mechanical energy through an electric motor to drive the wheels. With breakthroughs in battery energy density, electric drive system power, and other related technologies, electric vehicles have expanded from the small passenger car sector to the large freight vehicle sector. Large freight vehicles can include tractor units and semi-trailers. The tractor unit is attached to the end of the semi-trailer to provide traction, thereby moving the semi-trailer. The semi-trailer has storage space for accommodating cargo.

[0003] Currently, semi-trailers can be equipped with battery packs, electric drive axles, and thermal management devices. The battery pack stores electrical energy. The electric drive axle is electrically connected to the battery pack to drive the wheels of the semi-trailer. The thermal management device reduces heat generated by the battery pack during use. The battery pack, electric drive axle, and thermal management device enable independent power assistance for the semi-trailer, allowing the tractor and semi-trailer to work together, effectively changing the traditional passive following mode of semi-trailers without power.

[0004] However, the thermal management device in the relevant technology is directly connected to the longitudinal beam of the semi-trailer, which means that the semi-trailer frame cannot protect the thermal management device. This results in a high safety hazard and a significant risk to the thermal management device. Utility Model Content

[0005] The purpose of this application is to provide a semi-trailer and freight vehicle, so that the frame of the semi-trailer can effectively protect the thermal management device and ensure the safety and reliability of the semi-trailer.

[0006] To solve the above-mentioned technical problems, this application adopts the following technical solution: According to one aspect of this application, a semi-trailer is provided, comprising: two longitudinal beams, a thermal management crossbeam, and a thermal management device; the two longitudinal beams extend horizontally along the longitudinal direction and are spaced apart laterally; the thermal management crossbeam is disposed between the two longitudinal beams, extends horizontally laterally, and its two ends are respectively connected to the opposite sides of the two longitudinal beams; the upper surface of the thermal management crossbeam and the two longitudinal beams enclose a working space; the thermal management device is disposed within the working space, the bottom of the thermal management device is connected to the thermal management crossbeam, and the top of the thermal management device is lower than the upper surface of the longitudinal beams.

[0007] In some embodiments, the thermal management beam includes a support portion and two first reinforcing portions. The support portion is used to connect to the bottom of the thermal management device. The two first reinforcing portions are respectively disposed on both longitudinal sides of the support portion. The distance between the two first reinforcing portions gradually increases in the direction from top to bottom.

[0008] In some embodiments, the longitudinal beam includes a longitudinally extending web, a top side plate, and a bottom side plate. The longitudinal web is arranged vertically, and the top side plate and the bottom side plate are arranged horizontally. The top side plate and the bottom side plate are respectively arranged on both sides of the longitudinal web. The two bottom side plates extend towards each other to extend out of the longitudinal web. The thermal management beam also includes two second reinforcing parts, which are respectively disposed on opposite sides of the two first reinforcing parts. The second reinforcing parts extend horizontally in the transverse direction, and the lower surface of the second reinforcing parts is attached to the upper surface of the bottom side plate.

[0009] In some embodiments, the semi-trailer further includes a reinforcing beam located below the thermal management crossbeam and extending laterally; the reinforcing beam has an opening at the top and is connected to the bottom of the thermal management crossbeam to form a tubular structure.

[0010] In some embodiments, the thermal management beam is symmetrically arranged in the transverse direction; and / or, the reinforcing beam is symmetrically arranged in the transverse direction.

[0011] In some embodiments, a support frame is provided on the bottom surface of the longitudinal beam, and the support frame extends vertically; The semi-trailer also includes a diagonal brace, which is inclined to connect the reinforcing beam and the support frame. The diagonal brace, the support frame, the reinforcing beam, and the thermal management beam together form a triangular structure.

[0012] In some embodiments, the diagonal brace connects to one longitudinal side of the reinforcing beam; In the vertical direction, the bottom of the reinforcing beam extends downward beyond the longitudinal beam to increase the contact area between the reinforcing beam and the diagonal brace.

[0013] In some embodiments, the thermal management beam is provided with a plurality of weight-reducing holes, and the plurality of weight-reducing holes are arranged in an array; And / or, the thermal management beam is provided with a plurality of mounting holes, which are used for detachable connection between the thermal management beam and the thermal management device.

[0014] In some embodiments, flow gaps are provided at both ends of the thermal management beam, and the thermal management beam and the longitudinal beam form a drain hole at the flow gaps.

[0015] A freight vehicle includes: a tractor unit and a semi-trailer as described above; one end of the semi-trailer is connected to the tractor unit.

[0016] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: In this application, the bottom of the thermal management device is connected to the thermal management crossbeam, and the thermal management device is housed within the working space. On one hand, this allows the two longitudinal beams and the thermal management crossbeam to protect the thermal management device from external debris, ensuring its safety and reliability. On the other hand, it effectively improves the space utilization of the semi-trailer, achieving a lightweight design. Furthermore, the top of the thermal management device is lower than the upper surface of the longitudinal beams to effectively avoid interference between the thermal management device and related structures on the upper side of the longitudinal beams, ensuring the reliability and stability of the semi-trailer. Attached Figure Description

[0017] Figure 1 This is a partial structural schematic diagram of the semi-trailer frame of this utility model.

[0018] Figure 2 yes Figure 1 The diagram shows the structure after the thermal management device has been removed.

[0019] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle.

[0020] Figure 4 yes Figure 2 The diagram shows a structural schematic from another perspective.

[0021] Figure 5 yes Figure 2 A longitudinal view of the structure shown.

[0022] Figure 6 This is a structural schematic diagram of the thermal management crossbeam, reinforcing beam, and diagonal brace of this utility model.

[0023] Figure 7 yes Figure 6 The diagram shows a structural schematic from another perspective.

[0024] The reference numerals in the attached drawings are explained as follows: 100, longitudinal beam; 110, longitudinal web plate; 120, top side plate; 130, bottom side plate; 200, thermal management crossbeam; 210, support section; 220, first reinforcing section; 230, second reinforcing section; 241, weight reduction hole; 242, mounting hole; 243, grounding hole; 244, flow gap; 300, working space; 400, reinforcing beam; 500, support frame; 600, diagonal brace; 700, thermal management device. Detailed Implementation

[0025] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this application.

[0026] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In related technologies, freight vehicles may include tractor units and semi-trailers. The tractor unit is connected to the semi-trailer so that the tractor unit can move the semi-trailer. The semi-trailer has a storage space for accommodating cargo.

[0028] Figure 1 This is a partial structural diagram of the semi-trailer frame of this utility model. See Figure 1 The semi-trailer may also be equipped with a battery pack (not shown in the figure), an electric drive axle (not shown in the figure), and a thermal management device 700. The electric drive axle is electrically connected to the battery pack to receive electrical energy and drive the semi-trailer's wheels, thereby enabling coordinated movement of the tractor and semi-trailer, increasing the mileage of the freight vehicle, and improving its safety and reliability. The thermal management device 700 manages the heat of the battery pack, thereby reducing its temperature and ensuring stable and safe operation.

[0029] Figure 2 yes Figure 1 The diagram shows the structure after the thermal management device has been removed.

[0030] See Figure 2 For ease of understanding and description, the following text refers to the state of the freight vehicle in use, the longitudinal direction of the interval between the tractor and the semi-trailer, the vertical direction of the semi-trailer, and the lateral direction perpendicular to both the vertical and longitudinal directions.

[0031] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle. Figure 4 yes Figure 2 The diagram shows a structural schematic from another perspective.

[0032] See Figure 1 , Figure 2 and Figure 4 This application provides a semi-trailer, comprising: two longitudinal beams 100, a thermal management crossbeam 200, and a thermal management device 700. The two longitudinal beams 100 extend horizontally in the longitudinal direction and are spaced apart in the transverse direction. The thermal management crossbeam 200 is disposed between the two longitudinal beams 100. The thermal management crossbeam 200 extends horizontally in the transverse direction, and its two ends are respectively connected to the opposite sides of the two longitudinal beams 100. The upper surface of the thermal management crossbeam 200 and the two longitudinal beams 100 enclose a working space 300. The thermal management device 700 is disposed within the working space 300, with its bottom connected to the thermal management crossbeam 200 and its top lower than the upper surface of the longitudinal beams 100.

[0033] The bottom of the thermal management device 700 is connected to the thermal management crossbeam 200, and the thermal management device 700 is housed within the working space 300. On the one hand, this allows the two longitudinal beams 100 and the thermal management crossbeam 200 to protect the thermal management device 700 from external debris, ensuring the safety and reliability of the thermal management device 700; on the other hand, it effectively improves the space utilization of the semi-trailer and achieves a lightweight design for the semi-trailer.

[0034] Furthermore, the top of the thermal management device 700 is lower than the upper surface of the longitudinal beam 100 to effectively avoid interference between the thermal management device 700 and the related structures on the upper side of the longitudinal beam 100, thus ensuring the reliability and stability of the semi-trailer.

[0035] See Figure 2 and Figure 4 In this embodiment, the semi-trailer may include a frame and multiple wheels mounted on the frame.

[0036] The frame may include two longitudinal beams 100 and multiple connecting crossbeams (not shown in the figure). The two longitudinal beams 100 extend longitudinally and are spaced apart laterally. The multiple connecting crossbeams extend laterally and are spaced apart longitudinally. Both ends of the multiple connecting crossbeams are connected to the two longitudinal beams 100 respectively, thereby effectively improving the structural strength and reliability of the semi-trailer.

[0037] Figure 5 yes Figure 2 A longitudinal view of the structure shown.

[0038] See Figure 2, Figure 3 and Figure 5 In this embodiment, the longitudinal beam 100 may include a longitudinally extending web 110, a top side plate 120, and a bottom side plate 130. The longitudinal web 110 is vertically arranged. The top side plate 120 and the bottom side plate 130 are horizontally arranged. The top side plate 120 and the bottom side plate 130 are respectively arranged on both vertical sides of the longitudinal web 110. The bottom side plates 130 of the two longitudinal beams 100 extend towards each other to extend beyond the longitudinal web 110.

[0039] In some embodiments, the longitudinal beam 100 may be an I-beam. The top side plate 120 and the bottom side plate 130 extend laterally such that both sides of the top side plate 120 and the longitudinal web plate 110 extend beyond the longitudinal web plate 110.

[0040] In some embodiments, the longitudinal beam 100 may also be a channel beam. The openings of the two longitudinal beams 100 are arranged facing each other.

[0041] In some embodiments, the top side plate 120 is not required. The longitudinal beam 100 may include a longitudinal web plate 110 and a bottom side plate 130, so that the longitudinal beam 100 is a T-beam.

[0042] In some embodiments, the longitudinal beam 100 may also be a Z-shaped beam, such that the bottom side plate 130 of the longitudinal beam 100 is located between the two longitudinal web plates 110, thereby serving to support the thermal management device 700.

[0043] Figure 6 This is a structural schematic diagram of the thermal management crossbeam, reinforcing beam, and diagonal brace of this utility model. Figure 7 yes Figure 6 The diagram shows a structural schematic from another perspective.

[0044] See Figure 3 , Figure 6 and Figure 7 In this embodiment, the thermal management beam 200 is disposed between the two longitudinal beams 100 and extends laterally. The two ends of the thermal management beam 200 can be connected to the two longitudinal web plates 110, and the lower surface of the thermal management beam 200 can be attached to and connected to the bottom side plate 130, so as to effectively improve the connection strength and reliability between the thermal management beam 200 and the longitudinal beams 100, and improve the structural strength and torsional resistance of the semi-trailer.

[0045] See Figure 3 , Figure 6 and Figure 7 In this embodiment, the thermal management beam 200 may include a support portion 210 and two first reinforcing portions 220. The support portion 210 is used to connect to the bottom of the thermal management device 700. The two first reinforcing portions 220 are respectively disposed on both longitudinal sides of the support portion 210. The distance between the two first reinforcing portions 220 gradually increases from top to bottom.

[0046] On the one hand, the distance between the two first reinforcing parts 220 gradually increases from top to bottom, so that the included angle between the support part 210 and the two first reinforcing parts 220 is an obtuse angle. When the support part 210 and the bottom side plate 130 have the same height difference, the first reinforcing part 220 can have a larger width dimension, so that the relevant processing equipment can clamp and bend to form the support part 210 and the two first reinforcing parts 220. This reduces the forming difficulty of the heat management beam 200, improves the processing efficiency of the heat management beam 200, and reduces the production cost of the heat management beam 200 while ensuring the structural strength of the heat management beam 200.

[0047] Furthermore, the support portion 210 and the two first reinforcing portions 220 can enhance the structural strength of the heat management beam 200 itself, increase the connection area between the heat management beam 200 and the longitudinal web plate 110, prevent cracking at the connection between the heat management beam 200 and the longitudinal web plate 110 due to excessive local stress, and improve the overall structural strength and reliability of the semi-trailer.

[0048] On the other hand, the thermal management beam 200 and the bottom side plate 130 can form a trapezoidal frame structure to improve the overall rigidity of the semi-trailer, thereby effectively coping with the deformation risk under complex working conditions.

[0049] See Figure 3 , Figure 6 and Figure 7 In this embodiment, the thermal management beam 200 may further include two second reinforcing portions 230. The two second reinforcing portions 230 are respectively disposed on opposite sides of the two first reinforcing portions 220. The second reinforcing portions 230 extend horizontally in the transverse direction, and the lower surface of the second reinforcing portions 230 is attached to the upper surface of the bottom side plate 130.

[0050] The second reinforcing section 230 effectively increases the connection area between the thermal management beam 200 and the bottom side plate 130, thereby improving the connection strength between the thermal management beam 200 and the longitudinal beam 100 and enhancing the structural strength and torsional resistance of the semi-trailer. Furthermore, it transforms the narrow point contact between the thermal management beam 200 and the longitudinal beam 100 into a wide surface contact, effectively reducing the unit area pressure on the bottom side plate 130 and further improving the reliability and stability of the semi-trailer.

[0051] In some embodiments, the support portion 210, the first reinforcing portion 220 and the second reinforcing portion 230 are formed by bending a single plate to improve the structural strength and torsional resistance of the thermal management beam 200, thereby ensuring the stability and reliability of the semi-trailer.

[0052] See Figure 3 , Figure 6 and Figure 7In this embodiment, the thermal management beam 200 may be provided with a plurality of weight-reducing holes 241 to reduce the weight of the thermal management beam 200 while ensuring the structural strength of the thermal management beam 200.

[0053] In some embodiments, a plurality of weight-reducing holes 241 may be arranged in an array.

[0054] In some embodiments, a plurality of weight-reducing holes 241 may be provided in the middle of the support portion 210 to reduce the weight of the heat management beam 200 while ensuring the structural strength of the first reinforcing portion 220 and the second reinforcing portion 230 and the connection strength between the heat management beam 200 and the longitudinal beam 100.

[0055] See Figure 3 , Figure 6 and Figure 7 In this embodiment, the thermal management beam 200 may be provided with a plurality of mounting holes 242. The plurality of mounting holes 242 are used for detachable connection between the thermal management beam 200 and the thermal management device 700.

[0056] In some embodiments, the thermal management device 700 and the thermal management beam 200 may be bolted together so that the mounting hole 242 is used to receive and limit the bolt.

[0057] In some embodiments, the mounting hole 242 may be provided on the support portion 210 and located outside the plurality of weight-reducing holes 241, so as to ensure the structural strength of the thermal management beam 200 itself while reliably and safely confining the thermal management device 700 on the thermal management beam 200.

[0058] In some embodiments, the support portion 210 may also be provided with a grounding hole 243 for electrical grounding.

[0059] See Figure 3 , Figure 6 and Figure 7 In this embodiment, flow gaps 244 may be provided at both ends of the heat management beam 200. The heat management beam 200 and the longitudinal beam 100 form a drain hole at the flow gap 244.

[0060] When the chassis is undergoing treatments such as electrophoresis, the drain hole is used to quickly drain the liquid on the upper side of the thermal management beam 200. This allows the liquid between the thermal management beam 200 and the bottom side plate 130 to be quickly discharged to the outside through the drain hole, preventing liquid residue from remaining in the corner between the thermal management beam 200 and the bottom side plate 130, thereby improving the production efficiency of the semi-trailer.

[0061] In some embodiments, the flow gap 244 may be provided at the connection between the support portion 210 and the first reinforcing portion 220, and at the connection between the first reinforcing portion 220 and the second reinforcing portion 230.

[0062] In other embodiments, the flow gap 244 may be arc-shaped to avoid excessive local stress at the end of the thermal management beam 200, which could cause twisting and deformation.

[0063] In some embodiments, the thermal management beam 200 is symmetrically arranged in the transverse direction.

[0064] An intermediate plane can be provided between the two longitudinal beams 100. The intermediate plane extends in a direction perpendicular to the transverse direction, and the distance between the intermediate plane and the two longitudinal beams 100 is equal. The heat management crossbeam 200 itself is arranged symmetrically in the transverse direction, that is, the heat management crossbeam 200 is arranged symmetrically about the intermediate plane, so that the structure at both ends of the heat management crossbeam 200 is symmetrical, so that the structural strength and torsional resistance are the same after the two ends of the heat management crossbeam 200 are connected to the two longitudinal beams 100.

[0065] See Figure 4 and Figure 7 In this embodiment, the semi-trailer may further include a reinforcing beam 400. The reinforcing beam 400 is located below the thermal management crossbeam 200. The reinforcing beam 400 extends laterally. The reinforcing beam 400 is connected to the thermal management crossbeam 200 to form a support assembly, thereby effectively improving the structural strength and reliability of the support assembly.

[0066] In some embodiments, the top of the reinforcing beam 400 is open. The reinforcing beam 400 and the bottom of the thermal management crossbeam 200 are connected to form a tubular structure. This tubular structure can further improve the structural strength and reliability of the support assembly and enhance the torsional resistance of the frame.

[0067] In some embodiments, the reinforcing beam 400 may be a C-shaped beam with its opening facing upward, so as to connect with the thermal management crossbeam 200 to form a tubular structure.

[0068] In some embodiments, the reinforcing beam 400 may also be a rectangular tubular structure, so that the outer wall of the reinforcing beam 400 is attached to and connected to the heat management crossbeam 200, thereby strengthening the structural strength of the support assembly.

[0069] In some embodiments, the reinforcing beam 400 is symmetrically arranged in the transverse direction. That is, the reinforcing beam 400 may also be symmetrically arranged with respect to the intermediate plane.

[0070] See Figure 4 and Figure 7 In this embodiment, the connection between the reinforcing beam 400 and the thermal management beam 200 can be located outside the weight reduction hole 241 to increase the connection area between the reinforcing beam 400 and the thermal management beam 200 and improve the structural strength of the support assembly.

[0071] See Figure 7In this embodiment, vertically, the bottom of the reinforcing beam 400 extends downward beyond the longitudinal beam 100 to increase the contact area between the reinforcing beam 400 and other structures. See Figure 2 and Figure 3 In this embodiment, the semi-trailer may further include a support frame 500. The support frame 500 is disposed on the bottom surface of the longitudinal beam 100 and extends vertically. The support frame 500 may be disposed opposite to the thermal management crossbeam 200 for connection with the thermal management crossbeam 200, thereby further improving the structural strength and reliability of the frame.

[0072] In some embodiments, multiple support frames 500 may be provided on each of the two longitudinal beams 100, and the multiple support members are respectively arranged at intervals along the longitudinal direction. Furthermore, the multiple support frames 500 on the two longitudinal beams 100 are arranged in a one-to-one correspondence. At least one support member on the two longitudinal beams 100 is arranged opposite to the thermal management crossbeam 200, so that the two longitudinal beams 100 are respectively connected to the support assembly through the support members thereon, thereby further improving the structural strength and torsional resistance of the frame.

[0073] See Figure 6 and Figure 7 In this embodiment, the semi-trailer may further include a diagonal brace 600. The diagonal brace 600 is inclined to connect the reinforcing beam 400 and the support frame 500. The diagonal brace 600, the support frame 500, the reinforcing beam 400, and the thermal management crossbeam 200 form a triangular structure to improve the structural strength and reliability of the semi-trailer.

[0074] In some embodiments, there may be two diagonal braces 600. The upper ends of the two diagonal braces 600 are respectively connected to the same side wall in the longitudinal direction of the reinforcing beam 400, and the lower ends of the two diagonal braces 600 are respectively connected to the opposite sides of the two support frames 500, so that the diagonal braces 600, the support frames 500, the reinforcing beam 400 and the thermal management beam 200 form a triangular structure.

[0075] In some embodiments, the reinforcing beam 400 extends downward beyond the bottom side plate 130 to increase the connection area between the diagonal brace 600 and the reinforcing beam 400, thereby further improving the structural strength and reliability of the semi-trailer.

[0076] In other embodiments, the diagonal brace 600 can also be connected to the bottom wall of the reinforcing beam 400, as long as the connection between the reinforcing beam 400 and the diagonal brace 600 can be achieved.

[0077] See Figure 1In this embodiment, the bottom of the thermal management device 700 is connected to the thermal management crossbeam 200 and is located within the working space 300. Laterally, the thermal management device 700 is spaced apart from the two longitudinal beams 100 to facilitate the installation and removal of the thermal management device 700, thereby improving the maintenance efficiency of the semi-trailer.

[0078] In some embodiments, a rubber pad (not shown) is also provided between the thermal management device 700 and the thermal management beam 200 to improve the vibration resistance of the thermal management device 700.

[0079] See Figures 1 to 7 This application provides a semi-trailer. A thermal management device 700 is disposed on the upper side of the thermal management crossbeam 200 and on the lower side of the top side plate 120. On the one hand, it enables the two longitudinal beams 100 and the thermal management crossbeam 200 to effectively protect the thermal management device 700, preventing the thermal management device 700 from being damaged by collisions with external debris, thereby improving the safety and stability of the semi-trailer. On the other hand, it can prevent the thermal management device 700 from interfering with the related structures on the upper side of the longitudinal beam 100, thereby improving the reliability of the semi-trailer.

[0080] Furthermore, the installation of the thermal management crossbeam 200, reinforcing beam 400, support frame 500, and diagonal brace 600 can effectively improve the structural strength and torsional resistance of the semi-trailer, thereby extending the reliability and service life of the semi-trailer.

[0081] See Figures 1 to 7 This application also provides a freight vehicle, which includes: a tractor unit and a semi-trailer as described above; one end of the semi-trailer is connected to the tractor unit.

[0082] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0083] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A semi-trailer, characterized in that, include: Two longitudinal beams extend horizontally along the longitudinal direction, and the two longitudinal beams are spaced apart in the transverse direction; A heat management beam is disposed between the two longitudinal beams. The heat management beam extends horizontally in the transverse direction, and its two ends are respectively connected to the opposite sides of the two longitudinal beams. The upper surface of the heat management beam and the two longitudinal beams enclose a working space. A thermal management device is disposed within the workspace, the bottom of which is connected to the thermal management crossbeam, and the top of which is lower than the upper surface of the longitudinal beam.

2. The semi-trailer according to claim 1, characterized in that, The thermal management beam includes a support portion and two first reinforcing portions. The support portion is used to connect to the bottom of the thermal management device. The two first reinforcing portions are respectively disposed on both longitudinal sides of the support portion. The distance between the two first reinforcing portions gradually increases from top to bottom.

3. The semi-trailer according to claim 2, characterized in that, The longitudinal beam includes a longitudinal web, a top side plate, and a bottom side plate extending longitudinally. The longitudinal web is arranged vertically, and the top side plate and the bottom side plate are arranged horizontally. The top side plate and the bottom side plate are respectively arranged on both sides of the longitudinal web. The two bottom side plates extend towards each other to extend out of the longitudinal web. The thermal management beam also includes two second reinforcing parts, which are respectively disposed on opposite sides of the two first reinforcing parts. The second reinforcing parts extend horizontally in the transverse direction, and the lower surface of the second reinforcing parts is attached to the upper surface of the bottom side plate.

4. The semi-trailer according to claim 2, characterized in that, The semi-trailer also includes a reinforcing beam located below the thermal management crossbeam and extending laterally; the top of the reinforcing beam is open, and the reinforcing beam and the bottom of the thermal management crossbeam are connected to form a tubular structure.

5. The semi-trailer according to claim 4, characterized in that, The thermal management beam is symmetrically arranged in the transverse direction; and / or, the reinforcing beam is symmetrically arranged in the transverse direction.

6. The semi-trailer according to claim 4, characterized in that, The bottom surface of the longitudinal beam is provided with a support frame, which extends vertically. The semi-trailer also includes a diagonal brace, which is inclined to connect the reinforcing beam and the support frame. The diagonal brace, the support frame, the reinforcing beam, and the thermal management beam together form a triangular structure.

7. The semi-trailer according to claim 6, characterized in that, The diagonal brace connects to one longitudinal side of the reinforcing beam; In the vertical direction, the bottom of the reinforcing beam extends downward beyond the longitudinal beam to increase the contact area between the reinforcing beam and the diagonal brace.

8. The semi-trailer according to claim 1, characterized in that, The heat management beam is provided with multiple weight-reducing holes, and the multiple weight-reducing holes are arranged in an array. And / or, the thermal management beam is provided with a plurality of mounting holes, which are used for detachable connection between the thermal management beam and the thermal management device.

9. The semi-trailer according to claim 1, characterized in that, The heat management beam has flow gaps at both ends in the horizontal direction, and the heat management beam and the longitudinal beam form a drain hole at the flow gaps.

10. A freight vehicle, characterized in that, include: Tractor; The semi-trailer as described in any one of claims 1 to 9, wherein one end of the semi-trailer is connected to the tractor.

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