Carriage heating structure of U-shaped carriage

Abstract

The utility model provides a carriage heating structure of a U-shaped carriage, which comprises a smoke inlet device arranged on the back of a front plate of the carriage and communicated with an exhaust pipe of a vehicle engine, and further comprises a front plate heating component arranged on the back of the front plate, and a front heating component arranged at the joint of a bottom plate and the front plate and the joint of the front plate and a side plate on the inner side of the carriage, the tail heating assembly is arranged on the outer sides of the side plates and the bottom plate of the carriage, and the tail heating assembly is provided with a tail gas exhaust pipe communicated with the outside. High-temperature tail gas exhausted by an engine is collected through the smoke inlet device, the front plate, the bottom plate and the side plates of the compartment are heated through the front plate heating assembly, the front heating assembly and the tail heating assembly which are hollow, the bottom plate heating is the main heating part, and the rest is auxiliary heating. In the material conveying process, the position, close to the front side, of the compartment bottom plate with the most stacked materials can be heated and dried, and the problem that the materials are not completely dumped due to material adhesion is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a carriage heating structure of U-shaped carriage belongs to engineering machinery technical field. BACKGROUND

[0002] The rigid car is one of the common transport vehicles in mine vehicles, which has a more solid car body structure and powerful power, can stably run in the harsh environment of the mine, and has a service life far exceeding other mine trucks, which is very popular in the current mining industry all over the world.

[0003] The carriage structure of the rigid car is an open inclined car hopper structure, which stably stores materials in the carriage through the gravity of the materials, and the load capacity can reach hundreds of tons. In the development of the rigid car, due to the optimization of the vehicle power, the load capacity is also continuously improved, and the load capacity can be effectively improved by reducing the self weight of the vehicle body. The increase of the load capacity means that the material accumulation is also more and more, so the common material sticks to the bottom of the carriage, and it is difficult to completely dump during the lifting and unloading process of the carriage. During the tilting process, the center of gravity cannot change like dry materials with the lifting of the carriage. Lightly, it affects the lifting effect and unloading efficiency, and heavily, it can cause the vehicle to roll over due to the upward movement of the center of gravity. Therefore, designers design a heating structure that sets a heating channel at the vertical angle between the two sides of the inner side of the carriage, continuously heats the bottom layer of the material during transportation, makes it dry, avoids sticking to the bottom of the carriage, and ensures complete dumping of the material. But this structure occupies the material containing volume of the carriage and depends on the edge structure of the carriage, which has the disadvantages of increasing the self weight of the vehicle body and relying too much on the traditional carriage structure.

[0004] The traditional carriage is heavy, in order to reduce the weight of the carriage, a lightweight U-shaped carriage is designed, which cancels the vertical structure of the traditional carriage side plate and bottom plate, and is designed as a U-shaped arc surface structure, reduces the design of the flue, reduces the weight of the carriage, and at the same time increases the carrying volume. The existing Chinese public application with publication number CN118894034A can heat the carriage assembly and the vehicle. In the technical solution disclosed in the application, the carriage structure is the structure of the above-mentioned traditional carriage, and the heating structure is arranged at the edge of the inner side of the carriage, which occupies the carrying space of the carriage and increases the self weight.

[0005] In order to adapt to the structure of U-shaped carriage, at the same time, without occupying the inner side space of the carriage and being able to realize the heating of the carriage, a carriage heating structure of U-shaped carriage is needed to solve the above-mentioned problems. SUMMARY

[0006] Purpose of the invention: In view of the deficiencies in the prior art, the present invention provides a U-shaped carriage heating structure, which has a gas circulation function by utilizing the reinforcement ribs, reinforcement rib plates, cross beams and other structures of the carriage itself, and passes the exhaust gas emitted by the engine into the front plate, front and rear heating components. On the premise of achieving the basic function of exhaust gas emission, the front position where more materials are accumulated is mainly heated and dried, and other parts are auxiliary dried to ensure the smoothness of material unloading.

[0007] Technical solution: A cabin heating structure for a U-shaped cabin, comprising a smoke intake device arranged on the back of the cabin front panel, the smoke intake device being connected to the vehicle engine exhaust pipe, and further comprising a front panel heating assembly arranged on the back of the front panel, a front heating assembly arranged at the junction of the cabin inner bottom panel and the front panel and the front panel and the side panel, and a rear heating assembly arranged on the outside of the cabin side panel and the floor panel, the smoke intake device being connected to the front panel heating assembly, the front panel heating assembly being connected to the front heating assembly through a first front air hole opened on the front panel, the front heating assembly being connected to the rear heating assembly through a hollow reinforcement rib arranged on the upper edge of the side panel, and the rear heating assembly being provided with an exhaust pipe connected to the outside.

[0008] The utility model collects the high-temperature exhaust gas discharged by the engine through the smoke intake device, and heats the front plate, bottom plate and side plates of the car while achieving gas conduction through the internal hollow front plate heating component, front heating component and tail heating component. Among them, the bottom plate heating is the main heating part, and the rest are auxiliary heating, which mainly plays the function of exhaust gas transportation and discharge. During the material transportation process, the car bottom plate where the most material is accumulated near the front side can be heated and dried to avoid the problem of incomplete material dumping caused by material sticking. At the same time, the front plate heating and side plate heating can also assist in heating and drying, further improving the smoothness of material dumping, ensuring that the material can be dumped smoothly without occupying too much car carrying space, and can slightly increase the car carrying capacity, further improving the material transportation efficiency.

[0009] The smoke intake device comprises a shell body fixedly and closedly connected to the front plate and the front plate heating assembly, and at least one air intake port, wherein the air intake port is communicated with the engine exhaust pipe.

[0010] When the vehicle has a single engine or the exhaust gases merge into a single exhaust pipe, an air intake is provided, which is connected to the front plate heating assembly. The front plate heating assembly transmits the high-temperature exhaust gas to the front heating assembly through the first front air hole, and then transmits it to the rear heating assembly through the reinforcing ribs on both sides to heat the vehicle compartment. The first front air hole is provided near the center line of the vehicle compartment, which can make the high-temperature exhaust gas entering the front heating assembly flow evenly to both sides, making the heating more uniform.

[0011] The smoke intake device includes two air inlets. A partition is provided in the shell to divide the shell space into two cavities. An air inlet is provided in each cavity. A second front air hole connected to the front heating component is provided at the front plate position corresponding to the cavity close to the side of the vehicle body.

[0012] Large-tonnage rigid vehicles are usually driven by multiple engines, and each engine uses a separate exhaust pipe for exhaust gas discharge. Therefore, when used on vehicles with a dual-engine structure, the smoke intake device is provided with two air inlets separated by a partition. When working, the two cavities correspond to different positions of the front heating component, so that the high-temperature exhaust gas entering the front heating component can circulate to both sides. The amount of exhaust gas entering each side is larger and the temperature is higher, which increases the heat released by the exhaust gas in the front heating component and accelerates the drying of the material.

[0013] The front plate heating assembly includes a vertical curved plate arranged longitudinally and a transverse curved plate arranged transversely. The vertical curved plate and the transverse curved plate are both arranged as hollow structures. The transverse curved plate is connected to the vertical curved plate. The smoke inlet device is installed on the transverse curved plate and is connected to the transverse curved plate.

[0014] The transverse curved plate and the vertical curved plate are the reinforcing rib plate structures on the back of the front plate of the car body structure. The exhaust gas is conducted by using the structure of the vehicle itself, which saves construction costs. The intersection of the transverse curved plate and the vertical curved plate is connected to the inside of the vertical curved plate by opening a hole under the transverse curved plate. The exhaust gas entering the smoke intake device can flow through the transverse curved plate and the vertical curved plate to heat the front plate part, dry the material, and then flow into the front heating component.

[0015] The front heating assembly includes a horizontal sealing plate fixedly connected to the front plate and the bottom plate on both sides, a vertical sealing plate fixedly connected to the side plate and the front plate on both sides, and a top sealing plate fixedly arranged on the upper end of the vertical sealing plate. The horizontal sealing plate is fixedly connected to the vertical sealing plate as a whole, and the top sealing plate is fixedly connected to the vertical sealing plate, the front plate and the side plate as a whole. The first front air hole is opened at the position corresponding to the front plate and the horizontal sealing plate.

[0016] Through the combination of horizontal sealing plates, vertical sealing plates and top sealing plates, multi-directional drying of the bottom and sides is achieved. In the part of the carriage where the most materials are accumulated, the carriage structure is heated by the exhaust gas with a higher temperature, which achieves more efficient drying and prevents the materials from sticking to the walls of the carriage. This ensures that the materials can be completely dumped during unloading, and the materials in the rear part can be pushed out of the carriage by the gravity of the materials in the front.

[0017] The tail heating assembly includes at least one hollow crossbeam, which is a U-shaped structure arranged on the outside of the side panels and the bottom plate. The two ends of the crossbeam are respectively connected to the hollow reinforcement ribs arranged on the upper edges of the side panels on both sides. The two ends of the hollow reinforcement rib are blocked and connected to the front heating assembly through the side air holes opened on the side panels.

[0018] The cross beam is a reinforcing cross beam structure of the carriage structure itself, and the exhaust gas is connected to the cross beam by utilizing the characteristic that the cross beam is arranged around the carriage structure, so that the exhaust gas is transported to the tail part for emission, and the exhaust gas waste heat can assist in heating the side plate and the bottom plate, so as to reduce the adhesion between the material close to the tail part and the inner wall of the carriage, and make the material dumping process more smooth.

[0019] The tail part heating assembly comprises a hollow cross beam arranged close to the tail part of the carriage.

[0020] The cross beam close to the tail part is selected as the tail part heating assembly, so that the influence of the exhaust gas emission on the tire close to the tail part or other structural parts can be avoided after the exhaust gas is emitted after auxiliary heating.

[0021] The tail part heating assembly comprises all the cross beams arranged on the carriage, the cross beams are all arranged in a hollow structure and are all communicated with the reinforcing ribs, and the exhaust gas exhaust pipe is arranged on the lower side of the cross beam close to the tail part of the carriage.

[0022] The plurality of cross beams are combined to form the tail part heating assembly, so that the heating range is larger, the drying effect is better, the material dumping smoothness is further improved, and the exhaust gas exhaust pipe is arranged on the lower side of the cross beam close to the tail part of the carriage, so as to avoid the influence on the wheel or other structural parts.

[0023] One end of the exhaust gas exhaust pipe is communicated with the cross beam, and the other end extends to the tail part of the carriage until the position of the tire of the vehicle.

[0024] Due to the difference of the frame structures, the installation positions of the tires are different, in order to ensure that the exhaust gas emission position does not affect the health and quality of the tire, the exhaust gas exhaust pipe structure can be extended to emit the exhaust gas.

[0025] Beneficial effects: The high-temperature exhaust gas emitted by the engine is collected by the smoke inlet device, the front plate heating assembly, the front part heating assembly and the tail part heating assembly in the hollow interior are used to heat the front plate, the bottom plate and the side plate of the carriage, the bottom plate heating is the main heating part, the others are auxiliary heating, mainly for exhaust gas transportation and emission, the front side position close to the bottom plate of the carriage where the material is most stacked during the material transportation is heated and dried, the problem that the material adhesion causes incomplete material dumping is avoided, the front plate heating and the side plate heating also assist in heating and drying, the material dumping smoothness is further improved, the material can be smoothly dumped, the carriage carrying capacity is slightly improved, and the material carrying efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0027] Figure 1 It is the mounting structure diagram of the front heating assembly of the present application.

[0028] Figure 2 It is the mounting structure diagram of the front plate heating assembly and the tail heating assembly of the present application.

[0029] Figure 3 It is the internal structure diagram of the smoke inlet device of the present application.

[0030] Figure 4 It is the structure diagram of the front plate heating assembly of the present application.

[0031] Figure 5 It is the structure diagram of the front heating assembly of the present application.

[0032] Figure 6 It is the structure diagram of the tail heating assembly of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0034] In the description of the present application, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] like Figure 1 and 2 As shown, a cabin heating structure of a U-shaped cabin includes a smoke intake device 1 arranged on the back of the cabin front panel, the smoke intake device 1 is connected to the vehicle engine exhaust pipe, and also includes a front panel heating assembly 2 arranged on the back of the front panel, a front heating assembly 3 arranged at the junction of the cabin inner bottom panel and the front panel and the front panel and the side panel, and a tail heating assembly 4 arranged on the outside of the cabin side panel and the bottom panel, the smoke intake device 1 is connected to the front panel heating assembly 2, the front panel heating assembly 2 is connected to the front heating assembly 3 through a first front air hole 5 opened on the front panel, the front heating assembly 3 is connected to the tail heating assembly 4 through a hollow reinforcement rib 6 arranged on the upper edge of the side panel, and the tail heating assembly 4 is provided with an exhaust pipe 7 connected to the outside.

[0037] The utility model collects the high-temperature exhaust gas discharged by the engine through the smoke intake device 1, and heats the front plate, bottom plate and side plates of the car while achieving gas conduction through the internal hollow front plate heating component 2, front heating component 3 and tail heating component 4. Among them, the bottom plate heating is the main heating part, and the rest are auxiliary heating, which mainly plays the function of exhaust gas transportation and discharge. During the material transportation process, the car bottom plate with the most accumulated materials near the front side can be heated and dried to avoid the problem of incomplete material dumping caused by material sticking. At the same time, the front plate heating and side plate heating can also assist in heating and drying, further improving the smoothness of material dumping, ensuring that the materials can be dumped smoothly without occupying too much car carrying space, and can slightly increase the car carrying capacity, further improving the material transportation efficiency.

[0038] like Figure 3 and 4 As shown, the smoke intake device 1 includes a housing 11 fixedly and closedly connected to the front plate and the front plate heating assembly 2 and at least one air intake 12, and the air intake 12 is connected to the engine exhaust pipe.

[0039] When the vehicle has a single engine or the exhaust gases merge into a single exhaust pipe, an air intake 12 is provided, which is connected to the front panel heating assembly 2. The front panel heating assembly 2 transmits the high-temperature exhaust gas to the front heating assembly 3 through the first front air hole 5, and then transmits it to the rear heating assembly 4 through the reinforcing ribs 6 on both sides to heat the vehicle compartment. The first front air hole 5 is provided near the center line of the vehicle compartment, which can make the high-temperature exhaust gas entering the front heating assembly 3 flow evenly to both sides, making the heating more uniform.

[0040] The smoke intake device 1 includes two air inlets 12. A partition 13 is provided in the shell 11 to separate the shell 11 into two cavities. An air inlet 12 is provided in each cavity. A second front air hole 8 connected to the front heating component 3 is provided at the front plate position corresponding to the cavity close to the side of the vehicle body.

[0041] Large-tonnage rigid vehicles are usually driven by multiple engines, and each engine uses a separate exhaust pipe to discharge exhaust gas. Therefore, when used on a vehicle with a dual-engine structure, the smoke intake device 1 is provided with two air inlets 12, which are separated by a partition 13. When working, the two cavities correspond to different positions of the front heating component 3, so that the high-temperature exhaust gas entering the front heating component 3 can circulate to both sides. The amount of exhaust gas entering each side is greater and the temperature is higher, which increases the heat released by the exhaust gas in the front heating component 3 and accelerates the drying of the material.

[0042] like Figure 5 As shown, the front plate heating assembly 2 includes a vertical curved plate 21 arranged longitudinally and a horizontal curved plate 22 arranged transversely. The vertical curved plate 21 and the horizontal curved plate 22 are both arranged as hollow structures. The horizontal curved plate 22 is connected to the vertical curved plate 21, and the smoke inlet device 1 is installed on the horizontal curved plate 22 and is connected to the horizontal curved plate 22.

[0043] The transverse curved plate 22 and the vertical curved plate 21 are a 6-plate structure of reinforcing ribs on the back of the front plate of the car body structure. The exhaust gas is conducted by using the structure of the vehicle itself, which saves construction costs. The intersection of the transverse curved plate 22 and the vertical curved plate 21 is connected to the inside of the vertical curved plate 21 by opening a hole under the transverse curved plate 22. The exhaust gas entering the smoke intake device 1 can flow through the transverse curved plate 22 and the vertical curved plate 21 to heat the front plate part, dry the material, and then flow into the front heating component 3.

[0044] The front heating assembly 3 includes a horizontal sealing plate 31 fixedly connected to the front plate and the bottom plate on both sides, a vertical sealing plate 32 fixedly connected to the side plate and the front plate on both sides, and a top sealing plate 33 fixedly arranged on the upper end of the vertical sealing plate 32. The horizontal sealing plate 31 is fixedly connected to the vertical sealing plate 32 as a whole, and the top sealing plate 33 is fixedly connected to the vertical sealing plate 32, the front plate and the side plate as a whole. The first front air hole 5 is opened at the position corresponding to the front plate and the horizontal sealing plate 31.

[0045] Through the combination of the horizontal sealing plate 31, the vertical sealing plate 32 and the top sealing plate 33, multi-directional drying of the bottom and sides is achieved. The high-temperature exhaust gas is used to heat the compartment structure in the part of the compartment where the most materials are accumulated, achieving more efficient drying, avoiding the materials from sticking to the compartment walls, and ensuring that the materials can be completely dumped. The materials in the rear part can be pushed out of the compartment by the gravity of the front materials.

[0046] like Figure 6 As shown, the tail heating assembly 4 includes at least one hollow crossbeam 9, which is a U-shaped structure arranged on the outside of the side panels and the bottom plate. The two ends of the crossbeam 9 are respectively connected to the hollow reinforcement ribs 6 arranged on the upper edges of the side panels on both sides. The two ends of the hollow reinforcement rib 6 are blocked and connected to the front heating assembly 3 through the side air holes 10 opened on the side panels.

[0047] The crossbeam 9 is a reinforced crossbeam 9 structure of the car body structure itself. Taking advantage of its characteristic of being arranged around the car body structure, the exhaust gas is connected to the crossbeam 9. On the one hand, it is to transport the exhaust gas to the rear for discharge. At the same time, the residual heat of the exhaust gas can assist in heating the side panels and the bottom panel, reducing the viscosity of the material near the rear and the inner wall of the car body, making the material unloading process smoother.

[0048] The rear heating assembly 4 includes a hollow crossbeam 9 , which is arranged near the rear of the vehicle.

[0049] The crossbeam 9 near the tail is selected as the tail heating component 4, which can avoid the exhaust gas from affecting the tires or other structural parts near the tail when the exhaust gas is discharged after auxiliary heating.

[0050] The tail heating assembly 4 includes all cross beams 9 provided on the carriage, and the cross beams 9 are all provided with a hollow structure and are all connected to the reinforcing ribs 6. The exhaust pipe 7 is provided on the lower side of the cross beam 9 near the rear of the carriage.

[0051] Multiple crossbeams 9 are combined to form the rear heating assembly 4, which expands the heating range, achieves better drying effect, and further improves the smoothness of material unloading. The exhaust pipe 7 is arranged on the lower side of the crossbeam 9 near the rear of the car to avoid affecting the wheels or other structural parts.

[0052] One end of the exhaust pipe 7 is connected to the crossbeam 9, and the other end extends toward the rear of the vehicle compartment until it exceeds the position of the vehicle tires.

[0053] Since the frame structures are different, the tire installation positions are also different. In order to ensure that the exhaust gas emission position does not affect the health and quality of the tires, the exhaust gas can be discharged by extending the exhaust pipe 7 structure.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0055] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A U-shaped compartment heating structure, comprising a smoke inlet device (1) arranged on the back of the compartment front panel, wherein the smoke inlet device (1) is connected to the exhaust pipe of the vehicle engine, and is characterized in that: The vehicle further comprises a front panel heating assembly (2) arranged on the back of the front panel, a front heating assembly (3) arranged at the junction of the inner bottom panel and the front panel and the front panel and the side panel, and a rear heating assembly (4) arranged on the outer sides of the side panel and the bottom panel of the vehicle. The smoke inlet device (1) is communicated with the front panel heating assembly (2), the front panel heating assembly (2) is communicated with the front heating assembly (3) via a first front air hole (5) provided on the front panel, the front heating assembly (3) is communicated with the rear heating assembly (4) via a hollow reinforcing rib (6) provided on the upper edge of the side panel, and the rear heating assembly (4) is provided with an exhaust pipe (7) communicated with the outside.

2. The U-shaped compartment heating structure according to claim 1, characterized in that: The smoke intake device (1) comprises a housing (11) fixedly and closedly connected to the front plate and the front plate heating assembly (2) and at least one air intake (12), wherein the air intake (12) is communicated with an engine exhaust pipe.

3. The U-shaped compartment heating structure according to claim 2, characterized in that: The smoke intake device (1) includes two air intakes (12). A partition (13) is provided in the shell (11) to separate the shell (11) into two cavities. An air intake (12) is provided in each of the two cavities. A second front air hole (8) communicating with the front heating assembly (3) is provided at a front plate position corresponding to the cavity near the side of the vehicle compartment.

4. The U-shaped compartment heating structure according to claim 3, characterized in that: The front plate heating assembly (2) comprises a vertical curved plate (21) arranged longitudinally and a horizontal curved plate (22) arranged transversely, wherein the vertical curved plate (21) and the horizontal curved plate (22) are both arranged as hollow structures, the horizontal curved plate (22) is communicated with the vertical curved plate (21), and the smoke inlet device (1) is mounted on the horizontal curved plate (22) and is communicated with the horizontal curved plate (22).

5. The U-shaped compartment heating structure according to claim 4, characterized in that: The front heating assembly (3) comprises a horizontal sealing plate (31) whose two sides are fixedly connected to the front plate and the bottom plate respectively, a vertical sealing plate (32) whose two sides are fixedly connected to the side plate and the front plate respectively, and a top sealing plate (33) fixedly arranged on the upper end of the vertical sealing plate (32), the horizontal sealing plate (31) and the vertical sealing plate (32) are fixedly connected as a whole, the top sealing plate (33) and the vertical sealing plate (32), the front plate and the side plate are fixedly connected as a whole, the first front air hole (5) is opened at a position corresponding to the position of the front plate and the horizontal sealing plate (31), and the second front air hole (8) is opened at a position corresponding to the position of the front plate and the vertical sealing plate (32).

6. The U-shaped compartment heating structure according to claim 5, characterized in that: The tail heating assembly (4) includes at least one hollow crossbeam (9), which is a U-shaped structure and is arranged outside the two side panels and the bottom panel. The two ends of the crossbeam (9) are respectively connected to the hollow reinforcing ribs (6) arranged on the upper edges of the two side panels. The two ends of the hollow reinforcing rib (6) are blocked and are connected to the front heating assembly (3) through the side air holes (10) opened on the side panels.

7. The U-shaped compartment heating structure according to claim 6, characterized in that: The rear heating assembly (4) comprises a hollow crossbeam (9), and the crossbeam (9) is arranged near the rear of the carriage.

8. The U-shaped compartment heating structure according to claim 6, characterized in that: The tail heating assembly (4) includes all cross beams (9) provided on the carriage, the cross beams (9) are all provided as hollow structures and are all connected to the reinforcing ribs (6), and the exhaust pipe (7) is provided on the lower side of the cross beam (9) near the rear of the carriage.

9. The U-shaped compartment heating structure according to any one of claims 6 to 8, characterized in that: One end of the exhaust gas exhaust pipe (7) is connected to the crossbeam (9), and the other end extends toward the rear of the vehicle compartment until it exceeds the position of the vehicle tires.

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