Semitrailer frame and semitrailer

Abstract

The semitrailer frame comprises two girders, cross beams and supporting beams, the two girders are arranged at intervals, the cross beams and the supporting beams are arranged between the two girders, and the two ends of the cross beams and the two ends of the supporting beams are fixedly connected with the girders, so that the two girders are connected together through the cross beams and the supporting beams; the two girders are supported under the combined action of the cross beams and the supporting beams, and the overall stress strength of the semitrailer frame is improved. Wherein the cross beam is arranged in the vertical direction, the supporting beam is arranged in the horizontal direction, and the supporting beam is arranged behind the cross beam, so that the cross beam and the supporting beam define an installation space used for installing the electric drive control system, the cross beam, the cross beam and the supporting beam play a role in protecting the electric drive control system, and the electric drive control system is prevented from being damaged due to external impact; and a structure for protecting the electric drive control system does not need to be additionally arranged, so that the overall light weight of the vehicle is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semi-trailers, in particular to a semi-trailer frame and a semi-trailer. BACKGROUND

[0002] With the rapid advancement of the electrification trend of commercial vehicles, more and more vehicle manufacturers have begun to try to integrate power batteries, electric drive bridges and other core electric drive control systems on engineering semi-trailers. However, the current industry still generally adopts the "oil-to-electric" approach, that is, installing electric drive control systems in an external manner on the basis of traditional semi-trailers. In this scheme, three-electric components such as battery packs, electric control units and electric drive bridges are mostly arranged in a scattered manner, and some are even directly exposed to the outside of the frame. This layout not only has a scattered structure, long wiring harness and high cost, but also has a large safety hazard under complex engineering conditions, is easily damaged by external impact, and in severe cases may cause battery thermal runaway, vehicle failure and other problems. SUMMARY

[0003] The purpose of the present application is to provide a semi-trailer frame capable of protecting the electric drive control system.

[0004] To solve the above technical problems, the present application provides a semi-trailer frame, which comprises two girders, a cross beam and a support beam, the two girders are arranged at intervals, the cross beam is arranged between the two girders, the cross beam is fixedly connected with the two girders, the cross beam is arranged vertically, the support beam is arranged between the two girders, the support beam is fixedly connected with the girders, the support beam is arranged horizontally, the support beam is arranged behind the cross beam, the cross beam and the support beam enclose an installation space, and the installation space is used for installing an electric drive control system.

[0005] In some schemes of the present application, the cross beam comprises a first cross beam; the support beam comprises a battery support beam arranged at the rear side of the first cross beam, the battery support beam is located at the lower end of the girder; and a space for installing a power battery of the electric drive control system is formed above the battery support beam.

[0006] In some schemes of the present application, the battery support beam comprises a plurality of connecting beams and a first protective plate, the connecting beams are arranged at intervals in the horizontal direction, the two ends of the connecting beam are respectively fixedly connected with the two girders, the first protective plate is arranged between adjacent two connecting beams, and the two sides of the first protective plate in the length direction are connected with adjacent two connecting beams; and the two sides of the first protective plate in the width direction are respectively fixedly connected with the two girders.

[0007] In some schemes of the present application, the first protective plate is in a corrugated shape; and a drainage port is arranged at the lowest part of the first protective plate.

[0008] In some embodiments of the present application, the connecting beam is spaced apart from the first cross beam; and the battery support beam further comprises a second protective plate, two ends of the second protective plate in the length direction are connected with the first cross beam and the connecting beam close to the first cross beam respectively.

[0009] In some embodiments of the present application, the semi-trailer frame further comprises a high-voltage distribution box support beam, the high-voltage distribution box support beam is arranged between the two girders and connected with the cross beam, and a space for mounting a high-voltage distribution box of an electric drive control system is formed above the high-voltage distribution box support beam; the high-voltage distribution box support beam is located behind the battery support beam, the high-voltage distribution box support beam and the battery support beam are spaced apart in the length direction of the girder, the position of the high-voltage distribution box support beam is higher than that of the battery support beam, so that an operation space for wiring the power battery is formed between the high-voltage distribution box support beam and the battery support beam.

[0010] In some embodiments of the present application, the cross beam further comprises a second cross beam; the support beam further comprises a controller support beam, the controller support beam is located at the rear side of the second cross beam; a space for mounting a controller of an electric drive control system is formed above the controller support beam; the controller support beam comprises a first support beam and a second support beam, the first support beam and the second support beam are spaced apart in the horizontal direction, the first support beam is arranged on one side close to the second cross beam, and the first support beam is fixedly connected with the rear side of the second cross beam.

[0011] In some embodiments of the present application, the heat management device support beam and the controller support beam are spaced apart in the horizontal direction, the heat management device support beam is arranged behind the controller support beam, and a space for mounting a heat management device of an electric drive control system is formed above the heat management device support beam.

[0012] In some embodiments of the present application, the heat management device support beam is arranged at the lower part of the girder. The cross beam further comprises a third cross beam, the third cross beam is arranged above the heat management device support beam and located at the upper part of the girder.

[0013] In some embodiments of the present application, the top surfaces of the first cross beam and the second cross beam are lower than the top surface of the girder, so that a wire passing channel is formed between the top surfaces of the first cross beam and the second cross beam and the top surface of the girder.

[0014] In some embodiments of this application, the support beam further includes a battery support beam, and a space for installing a battery for an electric drive control system is formed above the battery support beam; the battery support beam includes a third support beam and a fourth support beam, which are spaced apart in the horizontal direction.

[0015] In some embodiments of this application, the top surface of the front end of the main beam is provided with a first connecting hole for detachable connection with an external front end; the top surface of the rear end of the main beam is provided with a second connecting hole for detachable connection with an external back end.

[0016] A semi-trailer, including the semi-trailer frame.

[0017] As can be seen from the above technical solution, the beneficial effects of the present invention are as follows: The semi-trailer frame of this application includes two main beams, a crossbeam, and a support beam. The two main beams are spaced apart, and the crossbeam and support beam are positioned between them. Both ends of the crossbeam and support beam are fixedly connected to the main beams, thus connecting the two main beams together. The crossbeam and support beam work together to support the two main beams, improving the overall structural strength of the semi-trailer frame. The crossbeam is vertically positioned, while the support beam is horizontally positioned, located behind the crossbeam. This arrangement creates an installation space for the electric drive control system. Furthermore, the crossbeam, main beam, and support beam protect the electric drive control system from external impacts, eliminating the need for a separate structure to protect the electric drive control system and achieving overall vehicle lightweighting. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a semi-trailer in one embodiment.

[0019] Figure 2 yes Figure 1 The diagram shows the main structural layout of the semi-trailer.

[0020] Figure 3 yes Figure 1 The diagram shows a top view of the semi-trailer.

[0021] Figure 4 This is a schematic diagram of the structure of a semi-trailer frame in one embodiment.

[0022] Figure 5 yes Figure 4 A magnified view of the structure at point A.

[0023] Figure 6 yes Figure 4 The diagram shows the structure of the semi-trailer frame from another perspective.

[0024] Figure 7 yes Figure 4 The diagram shows the front view of the semi-trailer frame.

[0025] Figure 8 yes Figure 4 The diagram shows a top view of the semi-trailer frame.

[0026] Figure 9 This is a schematic diagram of the battery support beam in one embodiment.

[0027] Figure 10 This is a schematic diagram of the structure of a mixer semi-trailer frame in one embodiment.

[0028] The annotations in the attached figures are explained as follows: 100 - Semi-trailer frame; 110 - Main beam; 111 - Web plate; 112 - Upper flange; 1121 - First connecting hole; 1122 - Second connecting hole; 113 - Lower flange; 114 - First main beam section; 115 - Second main beam section; 1151 - Inclined surface; 120 - Crossbeam; 121 - First crossbeam; 1211 - Mounting hole; 122 - Second crossbeam; 1221 - Weight reduction hole; 123 - Third crossbeam; 130 - Support beam; 131 - Battery support beam; 1311 - Connecting beam; 1312 - First protective plate; 13121 - Drain outlet; 1313 - Second protective plate; 132 - Controller support beam; 1321 - First support beam; 1322-Second support beam; 133-Thermal management device support beam; 1331-Support plate; 1332-Reinforcing rod; 134-Battery support beam; 1341-Third support beam; 1342-Fourth support beam; 140-Installation space; 150-High voltage distribution box support beam; 160-Traction disc crossbeam; 170-Tail end beam; 180-Spring bracket; 181-First spring bracket; 182-Second spring bracket; 183-Third spring bracket; 184-Fourth spring bracket; 190-Diagonal brace; 191-First diagonal brace; 192-Second diagonal brace; 193-Third diagonal brace; 101-Front end; 102-Back end; 200 - Electric drive control system; 210 - Power battery; 220 - High voltage distribution box; 230 - Controller; 240 - Thermal management device; 250 - Storage battery; 300-Electric drive bridge. Detailed Implementation

[0029] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0030] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back, etc.) 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. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0031] 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 technical features indicated. Thus, a feature defined as "first" or "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.

[0032] See Figures 1 to 3 A semi-trailer includes a semi-trailer frame 100, an electric drive control system 200, and an electric drive axle 300. The electric drive axle 300 is electrically connected to the electric drive control system 200 to form the three-electric system of an electric vehicle. The electric drive control system 200 and the electric drive axle 300 are mounted on the semi-trailer frame 100.

[0033] The electric drive control system 200 includes a power battery 210, a high-voltage distribution box 220, a controller 230, a storage battery 250, and a thermal management device 240. The high-voltage distribution box 220 is electrically connected to the controller 230, and the power battery 210 is also electrically connected to the high-voltage distribution box 220. The controller 230 is also electrically connected to the drive motor of the electric drive axle 300. This allows the controller 230 to control the high-voltage distribution box 220 to distribute the electricity stored in the power battery 210 to the power drive axle 300, thereby powering the drive motor of the drive axle 300 and driving the semi-trailer.

[0034] See Figure 3 , Figure 4 , Figure 7 and Figure 8The semi-trailer frame 100 includes two main beams 110, a crossbeam 120, and a support beam 130. The two main beams 110 are spaced apart and symmetrically arranged. A crossbeam 120 is positioned between the two main beams 110, with both ends of the crossbeam 120 fixedly connected to each of the two main beams 110. Similarly, a support beam 130 is positioned between the two main beams 110, with both ends fixedly connected to each of the main beams 110, thus connecting the two main beams 110 into a single structure via the crossbeams 120 and the support beams 130. The length direction of the main beam 110 is aligned with the longitudinal direction of the semi-trailer, and the two main beams 110 are spaced apart along the width direction of the semi-trailer. The length directions of the crossbeams 120 and the support beams 130 are aligned with the width direction of the semi-trailer. The distribution of the crossbeams 120 and the support beams 130 along the length direction of the main beams 110 ensures more even stress distribution across the semi-trailer frame 100, improving its stability.

[0035] The crossbeam 120 is vertically arranged, and the support beam 130 is horizontally arranged, with the support beam 130 positioned behind the crossbeam 120. The crossbeam 120 and the support beam 130 enclose an installation space 140 located between the two main beams 110. The installation space 140 is used to install the electric drive control system 200. After the electric drive control system 200 is installed in the installation space 140, the main beam 110 protects the electric drive control system 200 on both sides corresponding to the width of the semi-trailer, the crossbeam 120 protects the front of the electric drive control system 200, and the support beam 130 protects the lower side of the electric drive control system 200, preventing the electric drive control system 200 from being collided with during semi-trailer movement. For example, when the semi-trailer travels on roads with poor conditions, it may encounter flying gravel. The structure of the main beam 110, crossbeam 120, and support beam 130 of this application can effectively protect the electric drive control system 200, preventing it from being impacted by gravel.

[0036] In some embodiments, the bottom surfaces of the crossbeam 120 and the support beam 130 are higher than the bottom surface of the main beam 110, or the bottom surfaces of the crossbeam 120 and the support beam 130 are on the same plane as the bottom surface of the main beam 110, so that the two sides of the installation space 140 are completely blocked by the two main beams 110, thereby improving the protection effect on the electric drive control system 200.

[0037] See Figure 5, the main beam 110 includes a web 111, an upper flange 112 disposed on the top surface of the web 111, and a lower flange 113 disposed on the bottom surface of the web 111. The middle of the upper flange 112 is connected to the web 111, and the middle of the lower flange 113 is connected to the web 111, so that the upper flange 112, the web 111, and the lower flange 113 form an "I" - shaped steel structure, making the main beam 110 have greater mechanical strength. It should be noted that the upper flange 112, the web 111, and the lower flange 113 form a "匚" - shaped steel structure.

[0038] Refer to Figures 1 to 3 , in an embodiment, the rear end of the semi - trailer frame 100 is mainly used to carry the weight of the goods, and the front end of the semi - trailer frame 100 is mainly used to connect with the head of the tractor - pulled semi - trailer. The main beam 110 includes a first main beam section 114 and a second main beam section 115. The first main beam section 114 is located at the front end of the main beam 110, and the second main beam section 115 is located at the rear end of the main beam 110. The second main beam section 115 is connected to the first main beam section 114. The height dimension of the first main beam section 114 is smaller than the height dimension of the second main beam section 115, and the top surfaces of the second main beam sections 115 are flush, so that the main beam 110 as a whole forms a gooseneck structure, thereby reducing the overall weight of the semi - trailer frame 100 while ensuring the weight of the goods carried.

[0039] The bottom surface of the first main beam section 114 and the bottom surface of the second main beam section 115 are smoothly transitioned to avoid stress concentration at the height dimension change of the main beam 110 and ensure the mechanical strength of the main beam 110.

[0040] In some embodiments, an inclined surface 1151 is provided on the top surface of the rear end of the main beam 110 (i.e., the second main beam section 115), and the inclined surface 1151 slopes backward and downward. The design of the inclined surface 1151 can effectively reduce the wind resistance coefficient during vehicle driving. Especially when driving at high speed, by guiding the air flow to pass smoothly through the rear of the vehicle, the air resistance is reduced. The design of the inclined surface 1151 can also disperse the impact force to a wider area during a rear - end collision accident, reducing the concentrated damage to the rear part of the frame. The inclination angle range of the inclined surface 1151 is preferably​​​​​​​The crossbeam 120 includes a first crossbeam 121, a second crossbeam 122, and a third crossbeam 123, which are spaced apart along the length (i.e., front-to-back) of the main beam 110. The power battery 210, the high-voltage distribution box 220, the controller 230, and the thermal management device 240 can be distributed between the first crossbeam 121 and the second crossbeam 122, and between the second crossbeam 122 and the third crossbeam 123, so that the two main beams 110 and the first, second, and third crossbeams 121, 122, and 123 provide protection for the power battery 210, the high-voltage distribution box 220, the controller 230, and the thermal management device 240.

[0043] exist Figure 4 In the illustrated embodiment, the first crossbeam 121, the second crossbeam 122, and the third crossbeam 123 are all disposed on the second main beam section 115. Specifically, the first crossbeam 121 is disposed at the front end of the second main beam section 115, the second crossbeam 122 is disposed at the middle end of the second main beam section 115, and the third crossbeam 123 is disposed at the rear end of the second main beam section 115. This disperses the force transmitted through the first crossbeam 121, the second crossbeam 122, and the third crossbeam 123, thereby avoiding stress concentration and deformation of the main beam 110. It should be noted that the positions of the first crossbeam 121, the second crossbeam 122, and the third crossbeam 123 can be adjusted as needed. The power battery 210 and the high-voltage distribution box 220 are installed between the first crossbeam 121 and the second crossbeam 122, and the controller 230 and the thermal management device 240 are installed between the second crossbeam 122 and the third crossbeam 123.

[0044] The first crossbeam 121 is located on the side of the second main beam section 115 near the first main beam section 114. The first crossbeam 121 is vertically arranged, and its two ends are respectively connected to the web plates 111 of the two main beams 110. The bottom surface of the first crossbeam 121 is also connected to the lower flange plate 113 of the main beam 110, which makes the position of the first crossbeam 121 lower, thereby providing better protection for the front of the power battery 210 and the high-voltage distribution box 220.

[0045] The first crossbeam 121 has a mounting hole 1211 in the middle of its height direction. The charging interface of the power battery 210 can be installed on the rear side of the first crossbeam 121 and corresponding to the mounting hole 1211, thereby protecting the charging interface of the power battery 210. In addition, the mounting hole 1211 on the first crossbeam 121 reduces the weight of the first crossbeam 121.

[0046] The first crossbeam 121 has folded edges on both the upper and lower sides, which improves the load-bearing strength of the first crossbeam 121.

[0047] The second crossbeam 122 is located in the middle of the second main beam section 115 in the front-rear direction. The second crossbeam 122 is vertically arranged, and its two ends are respectively connected to the web plates 111 of the two main beams 110. The bottom surface of the second crossbeam 122 is also connected to the lower flange plate 113 of the main beam 110, which makes the position of the second crossbeam 122 lower, thereby making the protection effect of the second crossbeam 122 on the front side of the controller 230 and the thermal management device 240 better.

[0048] The second crossbeam 122 is provided with a weight-reducing hole 1221 to reduce its weight. The weight-reducing hole 1221 can also be used for wires and cooling pipes to pass through, facilitating the arrangement of lines and pipes between the power battery 210, the high-voltage distribution box 220, the controller 230, and the thermal management device 240. For example, the wires between the high-voltage distribution box 220 and the controller 230 can be passed through the weight-reducing hole 1221, or the cooling pipes between the power battery 210 and the thermal management device 240 can be passed through the weight-reducing hole 1221.

[0049] The second crossbeam 122 has folded edges on both the upper and lower sides, which improves the load-bearing strength of the second crossbeam 122.

[0050] The third crossbeam 123 is located at the rear end of the second main beam section 115. The third crossbeam 123 is located on the upper part of the main beam 110, and the height dimension of the third crossbeam 123 is small, so that the third crossbeam 123 will not block the hot airflow discharged by the thermal management device 240 when dissipating heat.

[0051] In some embodiments, the third crossbeam 123 is disposed at the lower part of the main beam 110, and the height dimension of the third crossbeam 123 is small, so that the third crossbeam 123 will not block the hot airflow discharged when the thermal management device 240 dissipates heat.

[0052] In some embodiments, multiple third crossbeams 123 are provided, with third crossbeams 123 located at both the lower and upper parts of the main beam 110, thereby improving the load-bearing strength of the semi-trailer frame 100. A heat dissipation space is provided between the third crossbeams 123 located at the lower and upper parts of the main beam 110, allowing the hot airflow exhausted by the thermal management device 240 during heat dissipation to be discharged through the heat dissipation space.

[0053] In some embodiments, the top surfaces of the first crossbeam 121, the second crossbeam 122, and the third crossbeam 123 are lower than the top surface of the main beam 110, that is, the top surfaces of the first crossbeam 121, the second crossbeam 122, and the third crossbeam 123 are located below the upper flange 112, so that a wiring channel is formed between the top surfaces of the first crossbeam 121, the second crossbeam 122, and the third crossbeam 123 and the top surface of the main beam 110. The electrical wiring and cooling pipes between the power battery 210, the high-voltage distribution box 220, the controller 230, the thermal management device 240, and the tractor head can be arranged in the wiring channel, thereby facilitating the arrangement of electrical wiring and cooling pipes.

[0054] When installing the power battery 210, high-voltage distribution box 220, controller 230, and thermal management device 240, these components are installed from above the semi-trailer frame 100 into the installation space 140. Then, electrical wiring and cooling pipes are arranged above the semi-trailer frame 100, making installation more convenient when the wiring and cooling pipes are routed through the wiring channel. The top surfaces of the first crossbeam 121, second crossbeam 122, and third crossbeam 123 also provide support for the electrical wiring and cooling pipes.

[0055] The support beam 130 includes a battery support beam 131, a controller support beam 132, and a thermal management device support beam 133. The battery support beam 131, the controller support beam 132, and the thermal management device support beam 133 are arranged sequentially along the length of the main beam 110.

[0056] A battery support beam 131 is disposed between the first crossbeam 121 and the second crossbeam 122, with its front end connected to the first crossbeam 121. A space is formed above the battery support beam 131 for mounting the power battery 210 of the electric drive control system 200. When the power battery 210 is mounted on the battery support beam 131, the first crossbeam 121 protects the front of the power battery 210, and the battery support beam 131 protects the bottom of the power battery 210, preventing flying debris from impacting the power battery 210.

[0057] The battery support beam 131 is horizontally positioned and located below the web 111, providing a larger space above the battery support beam 131 for installing the power battery 210 of the electric drive control system 200. Furthermore, the battery support beam 131 has a larger area for protecting the power battery 210, resulting in better protection.

[0058] See Figure 2 and Figure 9In some embodiments, the battery support beam 131 includes multiple connecting beams 1311 and a first protective plate 1312. The multiple connecting beams 1311 are spaced apart in the horizontal direction, and both ends of the connecting beams 1311 are fixedly connected to the two main beams 110. Specifically, the connecting beams 1311 can be fixedly connected to the web plate 111 or the lower flange plate 113 of the main beam 110. Figure 9 In the illustrated embodiment, the connecting beam 1311 includes a first support portion and first reinforcing portions connected to both sides of the first support portion. The two first reinforcing portions and the first support portion form an approximately "U"-shaped structure, thereby increasing the stress resistance of the connecting beam 1311. In some embodiments, the side of the first reinforcing portion away from the first support portion is further provided with a folded edge, thereby further increasing the stress resistance of the connecting beam 1311.

[0059] The first protective plate 1312 is disposed between two adjacent connecting beams 1311. The two sides of the first protective plate 1312 along its length are connected to the two adjacent connecting beams 1311, and the two sides of the first protective plate 1312 along its width are fixedly connected to the two large beams 110. This allows the first protective plate 1312 and the connecting beams 1311 to completely cover the bottom surface of the power battery 210, preventing flying debris from impacting the power battery 210. Furthermore, the interconnection between the first protective plate 1312 and the connecting beams 1311 improves the load-bearing strength of the battery support beam 131.

[0060] In some embodiments, the first protective plate 1312 is a plate structure, which not only protects the power battery 210, but also reduces the weight of the battery support beam 131, thereby reducing the overall weight of the semi-trailer frame 100.

[0061] In some embodiments, the first protective plate 1312 is corrugated, which increases the stress strength of the first protective plate 1312, thereby increasing the stress strength of the battery support beam 131.

[0062] The first protective plate 1312 is positioned below the top surface of the connecting beam 1311, and a drain outlet 13121 is provided at the lowest point of the first protective plate 1312. When the battery leaks liquid, or when water droplets fall on the outer surface of the power battery 210, the liquid can converge at the first protective plate 1312 and be discharged from the drain outlet 13121.

[0063] The position of the drain outlet 13121 on the first protective plate 1312 is higher than the bottom surface of the connecting beam 1311. Moreover, the drain outlet 13121 is located on the first protective plate 1312 near the front of the connecting beam 1311, so that the first protective plate 1312 can prevent flying gravel from entering the power battery 210 from the drain outlet 13121.

[0064] In some embodiments, the battery support beam 131 further includes a second protective plate 1313. In this embodiment, the connecting beam 1311 is spaced apart from the first crossbeam 121, and the two ends of the second protective plate 1313 in the longitudinal direction are respectively connected to the first crossbeam 121 and the connecting beam 1311 near the first crossbeam 121. The second protective plate 1313 is a plate structure, and the connection between the connecting beam 1311 and the first crossbeam 121 is achieved through the second protective plate 1313, which can increase the protection area of ​​the power battery 210 and reduce the overall weight of the semi-trailer frame 100. It should be noted that the connecting beam 1311 can also be set close to the first crossbeam 121, so that the second protective plate 1313 is not required between the connecting beam 1311 and the first crossbeam 121.

[0065] See Figure 7 and Figure 8 The controller support beam 132 is located behind the second crossbeam 122. The space above the controller support beam 132 is formed for installing the controller 230 of the electric drive control system 200. After the controller 230 is installed on the controller support beam 132, the second crossbeam 122 protects the front of the controller 230, and the controller support beam 132 protects the bottom of the controller 230.

[0066] exist Figure 7 In the embodiment shown, the controller support beam 132 includes a first support beam 1321 and a second support beam 1322. The first support beam 1321 and the second support beam 1322 are spaced apart in the horizontal direction, so that the first support beam 1321 and the second support beam 1322 can support the front and rear ends of the bottom of the controller 230 respectively, and the position of the support beam 130 is distributed, thereby improving the stress strength of the semi-trailer frame 100.

[0067] In some embodiments, the first support beam 1321 is disposed on one side near the second crossbeam 122, and the first support beam 1321 is fixedly connected to the rear side of the second crossbeam 122, thereby enabling the first support beam 1321 to strengthen the second crossbeam 122 and improve the stress strength of the second crossbeam 122.

[0068] exist Figure 7 In the embodiment shown, the first support beam 1321 includes a second support portion and a second reinforcing portion connected to the side of the second support portion away from the second crossbeam 122. The side of the second support portion near the second crossbeam 122 is fixedly connected to the second crossbeam 122, so that the first support beam 1321 and the second crossbeam 122 support each other, thereby improving the stress strength of the first support beam 1321 and the second crossbeam 122, and the structure is simple and the weight is reduced.

[0069] The structure of the second support beam 1322 is the same as that of the connecting beam 1311. That is, the second support beam 1322 includes a third support part and a third reinforcing part connected to both sides of the third support part. The two third reinforcing parts and the third support part form an approximately "U" shaped structure, thereby increasing the stress strength of the second support beam 1322.

[0070] The thermal management device support beam 133 is located behind the controller support beam 132, and the space above the thermal management device support beam 133 is used to form a space for installing the thermal management device 240 of the electric drive control system 200. After the thermal management device 240 is installed on the thermal management device support beam 133, the thermal management device 240 is located behind the controller 230, so that the heat dissipated by the thermal management device 240 will not affect the controller 230 and the power battery 210.

[0071] The thermal management device support beam 133 includes a support plate 1331, which is horizontally arranged so that the thermal management device support beam 133 can better support the thermal management device 240.

[0072] In some embodiments, the thermal management device support beam 133 further includes a reinforcing rod 1332, which is disposed on the bottom surface of the support plate 1331 to increase the stress strength of the support plate 1331.

[0073] In one embodiment, the third crossbeam 123 is disposed on the upper part of the main beam 110. The thermal management device support beam 133 is disposed close to the third crossbeam 123 and located on the lower part of the main beam 110, so that the thermal management device support beam 133 and the third crossbeam 123 respectively support the upper and lower sides of the main beam 110, thereby balancing the forces on the main beam 110 at the thermal management device support beam 133 and the third crossbeam 123. Moreover, disposing of the third crossbeam 123 on the upper part of the main beam 110 can also prevent the third crossbeam 123 from blocking the hot airflow discharged when the thermal management device 240 dissipates heat.

[0074] The thermal management device support beam 133 and the controller support beam 132 are spaced apart in the horizontal direction, so that the space between the thermal management device support beam 133 and the controller support beam 132 can allow the airflow entering the thermal management device 240 for heat exchange to pass through, and can also provide operating space when wiring the controller 230.

[0075] The support beam 130 also includes a battery support beam 134, above which a space is formed for mounting the battery 250 of the electric drive control system 200. The battery 250 is mounted on the battery support beam 134. The battery support beam 134 is positioned between the thermal management device support beam 133 and the controller support beam 132. The battery 250 is relatively small, therefore, placing it between the controller 230 and the thermal management device 240 does not obstruct the airflow into the thermal management device 240 for heat exchange, nor does it hinder wiring operations for the controller 230, and also makes the overall structure more compact. It should be noted that the battery support beam 134 can also be positioned near the rear end of the main beam 110, i.e., the battery 250 is mounted near the rear end of the main beam 110, facilitating routine maintenance of the battery 250.

[0076] In one embodiment, the battery support beam 134 includes a third support beam 1341 and a fourth support beam 1342, which are spaced apart horizontally. The two ends of the battery 250 in the front-rear direction are respectively connected to the third support beam 1341 and the fourth support beam 1342.

[0077] The semi-trailer frame 100 also includes a high-voltage distribution box support beam 150, which is located between the two main beams 110 and connected to the crossbeam 120. Above the high-voltage distribution box support beam 150, a space is formed for installing the high-voltage distribution box 220 of the electric drive control system 200.

[0078] exist Figure 7 In the illustrated embodiment, the high-voltage distribution box support beam 150 is located behind the battery support beam 131 and fixed to the second crossbeam 122. The high-voltage distribution box support beam 150 and the battery support beam 131 are spaced apart along the length of the main beam 110, with the high-voltage distribution box support beam 150 positioned higher than the battery support beam 131, creating an operating space between them for wiring the power battery 210. It should be noted that the high-voltage distribution box support beam 150 can also be connected to the main beam 110.

[0079] In some embodiments, the semi-trailer frame 100 further includes a traction disc beam 160, which is disposed at the front end of the main beam 110, i.e., connected to the first main beam section 114, to improve the stress strength at the first main beam section 114. The traction disc beam 160 is provided with a pivot for connecting to a tractor unit, so that the semi-trailer frame 100 is mounted on the tractor unit.

[0080] In some embodiments, the semi-trailer frame 100 further includes a rear end beam 170, which is disposed at the rear end of the main beam 110. The rear end beam 170 can serve as a mounting bracket for the rear end of the semi-trailer.

[0081] In one embodiment, the stress strength of the tail end beam 170 is less than that of the main beam 110, the cross beam 120 and the support beam 130, so that when the semi-trailer is rear-ended, the tail end beam 170 will break first to absorb the impact force and reduce the degree of damage.

[0082] Multiple spring supports 180 are provided below the main beam 110. Specifically, the spring supports 180 are mounted on the second main beam section 115. The multiple spring supports 180 are spaced apart along the length of the main beam 110, and are used to connect the shock-absorbing springs of the wheels. Figure 6 In the embodiment shown, there are four spring supports 180. The four spring supports 180 are arranged sequentially from the front end to the rear end of the main beam 110 as the first spring support 181, the second spring support 182, the third spring support 183 and the fourth spring support 184.

[0083] The positions of the first spring bracket 181, the second spring bracket 182, and the third spring bracket 183 correspond one-to-one with the positions of the battery support beam 131, the second crossbeam 122, and the thermal management device support beam 133, respectively. The semi-trailer frame 100 also includes multiple diagonal braces 190, which are correspondingly arranged with the multiple spring brackets 180, and the diagonal braces 190 are connected to the spring brackets 180 to support the spring brackets 180. Figure 6 In the illustrated embodiment, three diagonal braces 190 are provided: a first diagonal brace 191, a second diagonal brace 192, and a third diagonal brace 193. One end of the first diagonal brace 191 is connected to the first spring bracket 181, and the other end is connected to the battery support beam 131, enabling the first diagonal brace 191 to support the first spring bracket 181 and improve its structural stability. One end of the second diagonal brace 192 is connected to the second spring bracket 182, and the other end is connected to the second crossbeam 122, enabling the second diagonal brace 192 to support the second spring bracket 182 and improve its structural stability. One end of the third diagonal brace 193 is connected to the third spring bracket 183, and the other end is connected to the thermal management device support beam 133, enabling the third diagonal brace 193 to support the third spring bracket 183 and improve its structural stability.

[0084] Among them, the spring bracket 180 and the diagonal brace 190 can also prevent flying gravel from entering the installation space 140 from above the main beam 110, thereby preventing flying gravel from hitting the electric drive control system 200.

[0085] In one embodiment, the front top surface of the main beam 110 is provided with a first connecting hole 1121, which is specifically located on the upper wing plate 112. The first connecting hole 1121 is used for detachable connection with the front end 101. The rear top surface of the main beam 110 is provided with a second connecting hole 1122, which is specifically located on the upper wing plate 112. The second connecting hole 1122 is used for detachable connection with the rear end 102. The semi-trailer frame 100 can be used as a mixing semi-trailer frame 100, that is, after the front end 101 and the rear end 102 are connected to the semi-trailer frame 100, a mixing semi-trailer frame 100 is formed. The front end 101 and the rear end 102 are used to support the mixing drum of the mixing semi-trailer. When the semi-trailer frame 100 is not equipped with the front end 101 and the rear end 102, it can be used as a transport semi-trailer frame 100 (such as the frame of a rear-tipping dump semi-trailer), realizing the uniformity of the frame platform design, reducing design and manufacturing costs, and greatly improving production efficiency and parts commonality, giving full play to the advantages of large-scale development and manufacturing.

[0086] In some embodiments, the traction disc crossbeam 160 and the third crossbeam 123 are also provided with connection holes. The connection holes on the traction disc crossbeam 160 are used to connect with the front end 101 to improve the connection strength of the front end 101. The connection holes on the third crossbeam 123 are used to connect with the back end 102 to improve the connection strength of the back end 102.

[0087] The semi-trailer frame 100 of this application includes two main beams 110, a crossbeam 120, and a support beam 130. The two main beams 110 are spaced apart, and the crossbeam 120 and the support beam 130 are located between the two main beams 110. The two ends of the crossbeam 120 and the support beam 130 are fixedly connected to the main beams 110, so that the two main beams 110 are connected together through the crossbeam 120 and the support beam 130. That is, the crossbeam 120 and the support beam 130 work together to support the two main beams 110, thereby improving the overall stress strength of the semi-trailer frame 100. The crossbeam 120 is arranged vertically, and the support beam 130 is arranged horizontally. The support beam 130 is located behind the crossbeam 120, so that the crossbeam 120 and the support beam 130 form an installation space 140 for installing the electric drive control system 200. The crossbeam 120, the main beam 110 and the support beam 130 protect the electric drive control system 200 from damage by external impacts. There is no need to set up a separate structure for protecting the electric drive control system 200, thus achieving overall vehicle lightweighting.

[0088] Although the invention 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 the invention 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 frame, characterized in that, The device includes two main beams, a crossbeam, and a support beam. The two main beams are spaced apart, and the crossbeam is located between the two main beams and fixedly connected to the two main beams. The crossbeam is arranged vertically. The support beam is located between the two main beams and fixedly connected to the main beams. The support beam is arranged horizontally and located behind the crossbeam. The crossbeam and the support beam enclose an installation space for installing an electric drive control system.

2. The semi-trailer frame according to claim 1, characterized in that, The crossbeam includes a first crossbeam; The support beam includes a battery support beam, which is disposed on the rear side of the first crossbeam and located at the lower end of the main beam. The space above the battery support beam is used to install the power battery for the electric drive control system.

3. The semi-trailer frame according to claim 2, characterized in that, The battery support beam includes multiple connecting beams and a first protective plate. The multiple connecting beams are spaced apart in the horizontal direction. The two ends of the connecting beams are respectively fixedly connected to the two main beams. The first protective plate is disposed between two adjacent connecting beams, and the two sides of the first protective plate in the length direction are connected to the two adjacent connecting beams. The first protective plate is fixedly connected to the two large beams on both sides in the width direction.

4. The semi-trailer frame according to claim 3, characterized in that, The first protective plate is corrugated; A drain outlet is provided at the lowest point of the first protective plate.

5. The semi-trailer frame according to claim 3, characterized in that, The connecting beam is spaced apart from the first crossbeam; The battery support beam also includes a second protective plate, the two ends of which are connected to the first crossbeam and the connecting beam near the first crossbeam, respectively.

6. The semi-trailer frame according to claim 2, characterized in that, The semi-trailer frame also includes a high-voltage distribution box support beam, which is located between the two main beams and connected to the crossbeam. Above the high-voltage distribution box support beam, a space is formed for installing the high-voltage distribution box of the electric drive control system. The high-voltage distribution box support beam is located behind the battery support beam. The high-voltage distribution box support beam and the battery support beam are spaced apart along the length of the main beam. The high-voltage distribution box support beam is positioned higher than the battery support beam, thus creating an operating space between the high-voltage distribution box support beam and the battery support beam for wiring the power battery.

7. The semi-trailer frame according to claim 1, characterized in that, The crossbeam also includes a second crossbeam; The support beam also includes a controller support beam, which is located behind the second crossbeam; a space for installing the controller of the electric drive control system is formed above the controller support beam. The controller support beam includes a first support beam and a second support beam, which are spaced apart in the horizontal direction. The first support beam is located on the side close to the second crossbeam, and the first support beam is fixedly connected to the rear side of the second crossbeam.

8. The semi-trailer frame according to claim 7, characterized in that, The thermal management device support beam and the controller support beam are spaced apart in the horizontal direction. The thermal management device support beam is located behind the controller support beam, and the space above the thermal management device support beam is used to form a space for installing the thermal management device of the electric drive control system.

9. The semi-trailer frame according to claim 8, characterized in that, The thermal management device support beam is located at the lower part of the main beam; The crossbeam also includes a third crossbeam, which is disposed above the thermal management device support beam and located on the upper part of the main beam.

10. The semi-trailer frame according to claim 7, characterized in that, The top surfaces of the first and second crossbeams are lower than the top surface of the main beam, so that a wire passage is formed between the top surfaces of the first and second crossbeams and the top surface of the main beam.

11. The semi-trailer frame according to claim 1, characterized in that, The support beam also includes a battery support beam, and a space for installing the battery of the electric drive control system is formed above the battery support beam. The battery support beam includes a third support beam and a fourth support beam, which are spaced apart in the horizontal direction.

12. The semi-trailer frame according to claim 1, characterized in that, The top surface of the front end of the beam is provided with a first connecting hole, which is used for detachable connection with the external front end. The rear end top surface of the main beam is provided with a second connection hole, which is used for detachable connection with the external back end.

13. A semi-trailer, characterized in that, Includes the semi-trailer frame as described in any one of claims 1-12.

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