Vehicle chassis and automobile

Abstract

The utility model discloses a vehicle chassis and an automobile, and relates to the technical field of automobiles. The range extender assembly comprises an engine and a generator which are connected with each other; the methanol supply system is connected with the engine; the power system comprises a battery frame and a power battery arranged on the battery frame, and the power battery is electrically connected with the generator; the battery heat management system comprises an electric heater and a battery pipeline connected with the electric heater, the battery pipeline is attached to the power battery, the electric heater is arranged on the frame and located below the cab, the battery frame is arranged behind the cab, and the battery pipeline is connected with the battery frame. The battery heat management system and the air conditioning system of the cab share the electric heater, and the battery frame is arranged behind the cab. According to the technical scheme, the compactness and the simplicity of the chassis space are improved.

Description

[0001] This application claims priority to Chinese Patent Application No. 202520674442.8, filed on April 10, 2025, entitled "Vehicle Chassis and Automobile", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This utility model relates to the field of automotive technology, and in particular to a vehicle chassis and an automobile. Background Technology

[0003] With the rapid development of new energy vehicle technology, the complexity of vehicle thermal management systems is increasing. In the chassis layout of traditional vehicles, the air conditioning system and the battery thermal management system are two relatively important components. The air conditioning system is used to heat the passenger compartment, while the battery thermal management system needs to ensure battery performance and safety in low-temperature environments. Currently, multiple heating units and complex circulation pipelines need to be arranged on the chassis. This complex structure occupies a lot of space, increases the weight of the vehicle, manufacturing costs, and system maintenance difficulty, which is not conducive to the requirements of chassis space simplicity and compact design. Utility Model Content

[0004] The main purpose of this utility model is to provide a vehicle chassis and automobile, which aims to improve the compactness and simplicity of the chassis space.

[0005] To achieve the above objectives, this utility model provides a vehicle chassis, the vehicle chassis comprising:

[0006] Frame;

[0007] A range extender assembly, the range extender assembly including a connected engine and a generator;

[0008] A methanol supply system is connected to the engine;

[0009] A power system, comprising a battery frame and a power battery mounted on the battery frame, wherein the power battery is electrically connected to the generator; and

[0010] A battery thermal management system includes an electric heater and battery piping connected to the electric heater. The battery piping is in contact with the power battery. The electric heater is located on the vehicle frame and below the cab. The battery frame is located behind the cab. The battery thermal management system and the cab's air conditioning system share the electric heater. The battery frame is located behind the cab.

[0011] In one embodiment, the battery thermal management system further includes a heat exchanger, wherein the electric heater and the battery pipeline are both connected to the heat exchanger, and the circulating water in the battery pipeline exchanges heat with the circulating water in the heat exchanger.

[0012] In one embodiment, the vehicle chassis further includes an air conditioning condenser disposed on the vehicle frame, and the battery thermal management system further includes:

[0013] A battery expansion tank is provided on the battery frame and is used to store coolant;

[0014] A refrigeration unit is connected to the battery expansion tank. The coolant in the refrigeration unit is cooled by the refrigerant in the air conditioner condenser. The refrigeration unit, the heat exchanger, and the battery expansion tank are connected in series through the battery pipeline.

[0015] In one embodiment, the methanol supply system includes a mounting bracket and a methanol tank disposed on the mounting bracket. The mounting bracket is connected to the side of the vehicle frame and disposed on the outside of the vehicle frame. The mounting bracket covers at least two sides of the methanol tank. The methanol tank is connected to the engine to provide fuel to the engine.

[0016] In one embodiment, the methanol supply system further includes a support member that protrudes from the surface of the mounting bracket facing the vehicle frame and is connected to the bottom surface of the vehicle frame; and / or, the methanol supply system further includes a strap that is attached to the outer peripheral surface of the methanol tank and connected to the mounting bracket.

[0017] In one embodiment, the vehicle chassis further includes an exhaust system, the exhaust system including a muffler and an exhaust pipe connected to the muffler, the exhaust pipe being connected to the engine, the muffler being disposed inside the vehicle frame, and the exhaust pipe and / or the muffler being connected to the vehicle frame.

[0018] In one embodiment, the muffler includes a muffler body and a heat insulation layer sleeved on the outer periphery of the muffler body, wherein the muffler body is a cylindrical muffler.

[0019] In one embodiment, the muffler further includes a muffler mounting bracket and a clamp connected to the muffler mounting bracket, the clamp being sleeved on the outside of the muffler body; and / or, the exhaust system further includes an exhaust pipe bracket, the exhaust pipe bracket being connected to the vehicle frame and supported below the exhaust pipe.

[0020] In one embodiment, the battery frame is a sheet metal assembly structure.

[0021] In one embodiment, the power system further includes a mounting base plate that connects the battery frame and the vehicle frame.

[0022] In one embodiment, the vehicle chassis further includes a drive system, the drive system includes a drive motor, the generator and the power battery are both electrically connected to the drive motor, and the drive motor is fixed to the vehicle frame by a motor mounting structure.

[0023] In one embodiment, the motor mounting structure includes a motor bracket and a buffer pad, the motor bracket is connected to the vehicle frame, the buffer pad is disposed between the motor bracket and the vehicle frame, and the drive motor is connected to the motor bracket.

[0024] In one embodiment, the vehicle chassis further includes an engine cooling system, which includes an engine radiator and an engine expansion tank connected to the engine radiator. The engine radiator is located in front of the range extender assembly and connected to the vehicle frame, and the engine expansion tank is located on the battery frame.

[0025] In one embodiment, the vehicle chassis further includes a steering system connected to the frame and disposed between the engine radiator and the engine.

[0026] In one embodiment, the vehicle chassis further includes a range extender suspension beam, a range extender suspension bracket, a first damping pad, and a second damping pad. The range extender suspension beam is connected to the vehicle frame and supported below the engine. The first damping pad is disposed between the range extender suspension beam and the engine. Two range extender suspension brackets are provided along the width of the vehicle frame. Both range extender suspension brackets are connected to the vehicle frame and supported below the generator. The second damping pad is disposed between the engine and the range extender suspension bracket.

[0027] In one embodiment, the vehicle chassis further includes a battery controller and a main / auxiliary drive controller, which are spaced apart from each other along the height direction of the vehicle frame and connected to the power battery.

[0028] To achieve the above objectives, this utility model provides an automobile, which includes the vehicle chassis described above.

[0029] The technical solution of this application, by sharing a single electric heater between the vehicle's air conditioning system and battery thermal management system, enables a single heater to simultaneously heat both the battery and the cab. This reduces the number of components used, lowers the structural complexity of the vehicle chassis, and results in a simpler chassis layout, improving its compactness. Furthermore, with the electric heater positioned below the cab and the battery frame located behind it, the power battery and cab are relatively close to the electric heater. This allows for shorter air conditioning and battery piping, reducing space requirements on the chassis and further enhancing the compactness and simplicity of the vehicle chassis layout. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the chassis frame of this utility model;

[0032] Figure 2 This is a top view of the overall structure of the chassis frame embodiment of this utility model;

[0033] Figure 3 This is a partial structural diagram of an embodiment of the chassis frame of this utility model. Figure 1 ;

[0034] Figure 4 This is a partial structural diagram of an embodiment of the chassis frame of this utility model. Figure 2 ;

[0035] Figure 5 This is a side view of an embodiment of the vehicle frame chassis of this utility model;

[0036] Figure 6 This is a partial structural diagram of an embodiment of the chassis frame of this utility model. Figure 3 ;

[0037] Figure 7 This is a schematic diagram of the battery thermal management system in the vehicle chassis embodiment of this utility model;

[0038] Figure 8 This is a partial structural diagram of an embodiment of the chassis frame of this utility model. Figure 4 ;

[0039] Figure 9This is a schematic diagram of the methanol supply system in the chassis embodiment of this utility model. Figure 1 ;

[0040] Figure 10 This is a schematic diagram of the methanol supply system in the chassis embodiment of this utility model. Figure 2 ;

[0041] Figure 11 This is a schematic diagram of the exhaust system in the chassis embodiment of this utility model. Figure 1 ;

[0042] Figure 12 This is a schematic diagram of the exhaust system in the chassis embodiment of this utility model. Figure 2 ;

[0043] Figure 13 This is a schematic diagram of the power system in the embodiment of the vehicle frame chassis of this utility model;

[0044] Figure 14 This is a schematic diagram of the engine cooling system in the chassis embodiment of this utility model. Figure 1 ;

[0045] Figure 15 This is a schematic diagram of the engine cooling system in the chassis embodiment of this utility model. Figure 2 ;

[0046] Figure 16 This is a schematic diagram of the range extender assembly in the chassis embodiment of this utility model;

[0047] Figure 17 for Figure 16 Partial structural diagram;

[0048] Figure 18 This is a partial structural diagram of an embodiment of the chassis frame of this utility model. Figure 5 .

[0049] Explanation of icon numbers:

[0050] 100. Chassis; 210. Engine; 220. Generator; 310. Mounting bracket; 320. Methanol tank; 330. Support component; 340. Straps; 410. Battery frame; 420. Power battery; 430. Mounting base plate; 510. Electric heater; 520. Battery piping; 530. Heat exchanger; 540. Battery expansion tank; 550. Refrigeration unit; 600. Air conditioning condenser; 710. Muffler; 711. Muffler body; 712. Muffler mounting bracket; 713. Clamp; 720. Exhaust pipe; 730. Exhaust pipe bracket; 810. Engine radiator; 820. Engine expansion tank; 900. Steering system; 1010. Range extender suspension beam; 1020. Range extender suspension bracket; 1110. Battery controller; 1120. Main and auxiliary drive controller; 1200. Drive motor.

[0051] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of the present utility model.

[0053] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0054] Furthermore, in the embodiments of this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the embodiments of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by the embodiments of this utility model.

[0057] In traditional vehicle chassis layouts, the air conditioning system and battery thermal management system typically employ independent design schemes. That is, the air conditioning system requires a separate heater (such as a PTC heater or heat pump) to provide heating for the passenger compartment, while the battery system requires additional heating devices to ensure battery performance and safety in low-temperature environments. This approach usually results in the need to accommodate multiple heating units, circulation pipes, and other components within the chassis space, occupying a significant amount of space and hindering the requirements for a simple and compact chassis design.

[0058] In view of this, the present invention provides a vehicle chassis and automobile that uses a single electric heater to share the vehicle's air conditioning system and battery thermal management system. This enables a single heater to heat both the battery and the passenger compartment simultaneously, reducing the number of components used, lowering the structural complexity of the vehicle chassis, making the chassis layout simpler, and improving the compactness of the vehicle chassis arrangement.

[0059] To better understand the above technical solution, the following detailed explanation is provided in conjunction with the accompanying drawings.

[0060] like Figures 1 to 7 As shown in the figure, this utility model embodiment provides a vehicle chassis, the vehicle chassis comprising:

[0061] Frame 100;

[0062] The range extender assembly includes a connected engine 210 and a generator 220. It is understood that the combustion of the engine 210 can drive the generator 220 to generate electricity. The electrical energy generated by the generator 220 can directly drive the vehicle or charge the power battery 420 on the vehicle, thereby improving the vehicle's range.

[0063] A methanol supply system is connected to the engine 210. It is understood that the engine 210 uses methanol as fuel. Methanol is characterized by high combustion efficiency, clean emissions, and renewability. It is also inexpensive, and its energy cost per kilometer is 0.5 to 1 yuan lower than that of diesel, effectively reducing energy costs.

[0064] The power system includes a battery frame 410 and a power battery 420 mounted on the battery frame 410. The power battery 420 is electrically connected to a generator 220. It is understood that the battery frame 410, mounted on the vehicle frame 100, provides a mounting location for the power battery 420, which provides kinetic energy for vehicle operation. Specifically, the generator 220 is electrically connected to the power battery 420, and the electrical energy generated by the generator 220 can charge the power battery 420, thereby providing more kinetic energy for vehicle operation; and

[0065] The battery thermal management system includes an electric heater 510 and a battery pipeline 520 connected to the electric heater 510. The battery pipeline 520 is in contact with the power battery 420. The electric heater 510 heats the circulating water in the battery pipeline 520, thereby heating the power battery 420 and improving its performance and safety in low-temperature environments. The electric heater 510 is located on the vehicle frame 100 and below the cab. The battery frame 410 is located behind the cab. The battery thermal management system and the cab's air conditioning system share the electric heater 510. The shared electric heater 510 allows for simultaneous heating of both the power battery 420 and the cab, reducing the number of components and resulting in a simpler, more compact chassis layout. Optionally, the power battery 420 includes a battery box and a battery pack disposed within the battery box. The inner wall of the battery box has a coolant channel surrounding the battery pack. The battery piping 520 is connected to the coolant channel, allowing heated circulating water to enter and heat the battery pack. The air conditioning system for heating the cab can refer to a structure commonly found in current vehicles. The heated circulating water from the electric heater 510 can exchange heat with the circulating water in the battery piping 520, causing the circulating water in the battery piping 520 to absorb heat and increase in temperature.

[0066] In this embodiment, by sharing a single electric heater 510 between the vehicle's air conditioning system and battery thermal management system, a single heater can simultaneously heat both the battery and the cab. This reduces the number of components used, lowers the structural complexity of the vehicle chassis, and makes the chassis layout simpler and more compact. Furthermore, with the electric heater 510 positioned below the cab and the battery frame 410 positioned behind it, the power battery 420 and the cab are relatively close to the electric heater 510. This allows for shorter air conditioning system circulation pipes and battery pipes 520, reducing the space occupied on the frame 100 and further improving the compactness and simplicity of the vehicle chassis layout.

[0067] In one embodiment of this utility model, reference is made to Figure 4 , Figure 6 as well as Figure 7 The battery thermal management system further includes a heat exchanger 530. The electric heater 510 and the battery pipeline 520 are both connected to the heat exchanger 530. The circulating water in the battery pipeline 520 exchanges heat with the circulating water in the heat exchanger 530. Specifically, the circulating water in the battery pipeline 520 and the circulating water heated by the electric heater 510 exchange heat in the heat exchanger 530. That is, the circulating water in the battery pipeline 520 absorbs heat, its temperature rises, and the battery pack is heated; the portion of the circulating water heated by the electric heater 510 that flows to the heat exchanger 530 releases heat, its temperature decreases, and it flows back to the electric heater 510 for heating.

[0068] In one embodiment of this utility model, reference is made to Figures 4 to 7 The vehicle chassis also includes an air conditioning condenser 600 disposed on the frame 100, and the battery thermal management system further includes:

[0069] A battery expansion tank 540 is provided on the battery frame 410 and is used to store coolant;

[0070] A refrigeration unit 550 is connected to the battery expansion tank 540 and the air conditioner condenser 600. The coolant of the refrigeration unit 550 is cooled by the refrigerant of the air conditioner condenser 600. The refrigeration unit 550, the heat exchanger 530 and the battery expansion tank 540 are connected in series through the battery pipeline 520.

[0071] Specifically, the chiller 550, battery expansion tank 540, and heat exchanger 530 are connected in series via battery piping 520. The optimal operating temperature of the battery pack is between 20°C and 40°C. When the battery pack temperature is within this range, the battery pack does not require heating or cooling, and the heat exchanger 530 and chiller 550 are not in operation. The coolant (i.e., circulating water) in the battery expansion tank 540 is drawn in and pressurized by the battery electric water pump and enters the coolant channel of the battery pack. Then it flows out of the battery pack, passes through the heat exchanger 530 and chiller 550, and returns to the battery expansion tank 540, forming a circulation loop.

[0072] When the battery pack needs cooling, the liquid cooling mode is activated, the refrigerator 550 works, and the heat exchanger 530 does not work. The refrigerant in the air conditioning condenser 600 cools the coolant in the battery pipe 520. As the temperature of the coolant in the battery pipe 520 decreases, it flows to the coolant channel of the battery box to cool the battery pack and ensure the optimal operating temperature of the battery pack.

[0073] When the battery pack needs heating, the heating mode is activated: when the range extender assembly is not started, the electric heater 510 heats the circulating water in the heating circuit of the air conditioning system. The circulating water in the heating circuit flows to the heat exchanger 530, and is transferred to the coolant in the battery pipeline 520 through the heat exchanger 530, so as to raise the temperature of the coolant in the battery pipeline 520 and realize the heating of the battery pack.

[0074] To better control the operating status of the heat exchanger 530 and the chiller 550, a first valve can be installed between the heat exchanger 530 and the heating circuit, and a second valve can be installed between the chiller 550 and the air conditioner condenser 600. The switching of the operating status of the heat exchanger 530 and the chiller 550 can be achieved by opening and closing the valves.

[0075] In one embodiment, the first valve is a three-way valve, connected to the hot water circulation loop of the engine 210 in the range extender assembly. When the engine 210 of the range extender assembly starts, the electric heater 510 (PTC) can be deactivated, switching the three-way valve to connect the engine 210 hot water circulation loop and the heat exchanger 530. The heat from the hot water in the engine 210 hot water circulation loop is transferred to the battery circuit 520 via the heat exchanger 530, heating the battery pack and ensuring its optimal operating temperature. This allows for the utilization of waste heat from the engine 210.

[0076] In this embodiment, the battery expansion box 540 is directly integrated and mounted on the battery frame 410, saving the use of brackets and simplifying the structure.

[0077] In one embodiment of this utility model, reference is made to Figures 8 to 10The methanol supply system includes a mounting bracket 310 and a methanol tank 320 disposed on the mounting bracket 310. The mounting bracket 310 is connected to the side of the vehicle frame 100 and disposed on the outside of the vehicle frame 100. The mounting bracket 310 covers at least two sides of the methanol tank 320. The methanol tank 320 is connected to the engine 210 to provide fuel to the engine 210.

[0078] Specifically, the methanol supply system includes a mounting bracket 310 and a methanol tank 320. The mounting bracket 310 is located on the side of the vehicle frame 100 and is used to mount the methanol tank 320. The methanol tank 320 stores methanol fuel and is connected to the engine 210 to supply fuel to the engine 210. Optionally, the methanol tank 320 is made of stainless steel to effectively prevent corrosion. The methanol tank 320 is located on the outside of the vehicle frame 100, reducing the space occupied in the middle of the vehicle frame 100 and facilitating the arrangement of other components. The mounting bracket 310 can be fixed to the vehicle frame 100 by welding or screwing. In one embodiment, the mounting bracket 310 is an L-shaped bracket, with one side connected to the vehicle frame 100 and the other side supporting the bottom surface of the methanol tank 320. To improve the stability of the methanol tank 320, at least two L-shaped brackets are spaced apart along the length of the vehicle frame 100.

[0079] In other embodiments, the methanol supply system also includes a carbon canister connected to the methanol tank 320 and the engine 210. In this way, the methanol vapor in the methanol tank 320 and the supply pipeline is introduced into the carbon canister to prevent it from being directly discharged into the air. The activated carbon in the carbon canister adsorbs and stores the methanol vapor. When the engine 210 is running, the stored methanol vapor is sent into the engine 210 for combustion, reducing waste.

[0080] In one embodiment of this utility model, reference is made to Figure 8 and Figure 10The methanol supply system further includes a support member 330, which protrudes from the surface of the mounting bracket 310 facing the vehicle frame 100 and is connected to the bottom surface of the vehicle frame 100. This increases the contact area between the mounting bracket 310 and the vehicle frame 100, improving the connection reliability between the mounting bracket 310 and the vehicle frame 100, and thus improving the installation reliability of the methanol tank 320. Optionally, the support member 330 and the vehicle frame 100 are welded or bolted together; the support member 330 and the mounting bracket 310 are integrally bent or welded together. In one embodiment, the edge of the support member 330 has a downwardly bent flange, which can improve the structural strength of the support member 330; and / or, the methanol supply system further includes a strap 340, which is attached to the outer peripheral surface of the methanol tank 320 and connected to the mounting bracket 310. Understandably, the methanol tank 320 can be secured by the straps 340, which bind the methanol tank 320 to the mounting bracket 310, thereby further improving the stability of the methanol tank 320.

[0081] In one embodiment of this utility model, reference is made to Figure 11 and Figure 12 The vehicle chassis also includes an exhaust system, which includes a muffler 710 and an exhaust pipe 720 connected to the muffler 710. The exhaust pipe 720 is connected to the engine 210. The muffler 710 is located inside the frame 100, and both the exhaust pipe 720 and / or the muffler 710 are connected to the frame 100. It is understood that the exhaust system can discharge the exhaust gases generated during combustion of the engine 210. Specifically, the exhaust system includes a muffler 710 and an exhaust pipe 720. One end of the exhaust pipe 720 is connected to the exhaust port of the engine 210, and the other end is connected to the muffler 710. The exhaust gases from the engine 210 are discharged through the exhaust pipe 720, while the muffler 710 reduces the noise during exhaust gas discharge. Optionally, the exhaust pipe 720 is fixedly connected to the frame 100, and the muffler 710 is fixed in the middle of the frame 100. In one embodiment, to improve the general layout of special-purpose vehicles such as sanitation vehicles, the exhaust pipe 720 is arranged inside the frame 100, while meeting the clearance requirements for the engine 210, front suspension shock absorber, and drive motor 1200. This arrangement balances assemblability, maintainability, and heat protection, meeting relevant requirements. Optionally, the exhaust pipe 720 is made of SUS304 stainless steel, which offers better strength. Alternatively, a protective layer made of fiberglass can be applied to the exterior of the exhaust pipe 720 to better protect it and improve exhaust flow.

[0082] In one embodiment of this utility model, reference is made to Figure 11 and Figure 12The silencer 710 includes a silencer body 711 and a heat insulation layer sleeved on the outer periphery of the silencer body 711. The silencer body 711 is a cylindrical silencer 710. Specifically, the cylindrical silencer 710 achieves multi-path interference reduction of sound waves through an axisymmetric structure, optimizing the elimination efficiency of high-frequency and low-frequency noise. The outer heat insulation layer effectively blocks heat conduction, preventing the silencer body 711 from deforming due to thermal stress at high temperatures and avoiding heat leakage that could cause thermal damage to surrounding equipment. Acoustic performance and thermal protection performance are synergistically enhanced.

[0083] In one embodiment of this utility model, reference is made to Figure 11 and Figure 12 The muffler 710 further includes a muffler mounting bracket 712 and a clamp 713 connected to the muffler mounting bracket 712, the clamp 713 being sleeved on the outside of the muffler body 711. It is understood that one end of the muffler mounting bracket 712 is fixedly connected to the vehicle frame 100, and the other end of the muffler mounting bracket 712 extends to the inner side of the vehicle frame 100 and is in contact with the muffler body 711. The clamp 713 connects the muffler body 711 and the muffler mounting bracket 712, thereby fixing the muffler body 711 to the muffler mounting bracket 712. Optionally, at least two muffler mounting brackets 712 are provided at axial intervals along the muffler body 711, thus improving the reliability of the muffler body 711's fixation; and / or, the exhaust system further includes an exhaust pipe bracket 730, the exhaust pipe bracket 730 being connected to the vehicle frame 100 and supported below the exhaust pipe 720. Understandably, one end of the exhaust pipe bracket 730 is fixedly connected to the vehicle frame 100, and the other end of the exhaust pipe bracket 730 extends to the lower pipe of the exhaust pipe 720 to support the exhaust pipe 720. Optionally, the exhaust pipe bracket 730 is provided with a slot, in which the exhaust pipe 720 is engaged, thereby fixing the exhaust pipe 720 on the exhaust pipe bracket 730. In one embodiment, the exhaust pipe 720 includes a plurality of exhaust branch pipes connected in sequence, and each exhaust branch pipe is provided with at least one exhaust pipe bracket 730.

[0084] In one embodiment of this utility model, the battery frame 410 is a sheet metal assembly structure. Currently, common battery frames 410 are typically constructed from rectangular tubes welded with reinforcing ribs, resulting in complex structures, heavy weight, and inconvenient assembly and disassembly. In contrast, the battery frame 410 in this embodiment employs sheet metal processing and modular assembly, resulting in a simpler structure, easier processing, lighter weight, and lower cost. It also allows for vertical or lateral installation of the battery pack, effectively improving the flexibility of battery pack assembly and disassembly.

[0085] In one embodiment of this utility model, reference is made to Figure 13The power system also includes a mounting base plate 430, which connects the battery frame 410 and the vehicle frame 100. It is understood that the mounting base plate 430 is positioned between the battery frame 410 and the vehicle frame 100, and the battery frame 410 is fixed to the vehicle frame 100 via the mounting base plate 430. Optionally, the mounting base plate 430 includes four independently arranged U-shaped plates, each U-shaped plate spanning a longitudinal beam of the vehicle frame 100; that is, two sides of the U-shaped plate are connected and fixed to the longitudinal beam of the vehicle frame 100, and the top edge of the U-shaped plate is connected and fixed to the battery frame 410. The arrangement of multiple U-shaped plates improves the reliability of the fixation between the battery frame 410 and the vehicle frame 100.

[0086] In one embodiment of this utility model, reference is made to Figure 2 The vehicle chassis also includes a drive system, which includes a drive motor 1200. The generator 220 and the power battery 420 are both electrically connected to the drive motor 1200. The drive motor 1200 is fixed to the frame 100 via a motor mounting structure. It is understood that the motor mounting structure allows for convenient and reliable fixing of the drive motor 1200 to the frame 100.

[0087] In one embodiment of this utility model, the motor mounting structure includes a motor bracket and a buffer pad. The motor bracket is connected to the vehicle frame 100, and the buffer pad is disposed between the motor bracket and the vehicle frame 100. The drive motor 1200 is connected to the motor bracket. Specifically, the motor mounting and fixing structure includes a motor bracket and a buffer pad. One end of the motor bracket is fixedly connected to the vehicle frame 100, and the other end of the motor bracket is supported below the drive motor 1200. The buffer pad is disposed between the motor bracket and the drive motor 1200 and can absorb vibration, thereby improving the reliability of the connection between the drive motor 1200, the motor bracket, and the vehicle frame 100. Optionally, the motor bracket has a U-shaped structure and four brackets are provided to improve the reliability of motor fixing.

[0088] In one embodiment of this utility model, reference is made to Figure 14 and Figure 15The vehicle chassis also includes an engine cooling system, which comprises an engine radiator 810 and an engine expansion tank 820 connected to the engine radiator 810. The engine radiator 810 is located in front of the range extender assembly and connected to the vehicle frame 100, while the engine expansion tank 820 is located on the battery frame 410. Thus, the engine cooling system effectively dissipates heat from the engine 210, ensuring it operates in a suitable temperature environment and guaranteeing its normal operation. Specifically, the engine cooling system includes an engine radiator 810 and an engine expansion tank 820. The engine radiator 810 is fixed to the vehicle frame 100 and located in front of the range extender assembly, which reduces the amount of piping required and further optimizes the vehicle chassis layout. The engine radiator 810, engine 210, and engine expansion tank 820 are connected by cooling pipes. After the engine 210 starts working, the coolant circulates between the engine 210 and the engine radiator 810 along the cooling pipes, absorbing the heat generated by combustion in the engine 210. After absorbing heat, the coolant temperature rises and flows to the engine radiator 810. After being cooled by the engine radiator 810, the coolant returns to the engine 210 to continue absorbing heat, forming a cycle. Optionally, the engine cooling system also includes an engine 210 water pump, connected to the cooling pipes, capable of driving the coolant flow. In one embodiment, a cooling fan is integrated into the engine radiator 810. When the vehicle is traveling at low speed or parked, the cooling fan starts, accelerating airflow and forcing air to flow over the surface of the radiator. The coolant in the radiator comes into contact with the air through the fins, dissipating the heat of the coolant into the air, thereby improving the cooling effect. In this embodiment, the engine expansion box 820 is mounted on the battery frame 410 behind the cab. This allows the power battery 420, battery expansion box 540, and engine expansion box 820 to share a single battery frame 410 for mounting and fixing, saving on the use of components, further simplifying the structure, and improving the simplicity of the vehicle chassis layout.

[0089] In one embodiment of this utility model, reference is made to Figure 18 The vehicle chassis also includes a steering system 900, which is connected to the frame 100 and located between the engine radiator 810 and the engine 210. This allows for efficient use of the space within the frame 100, and the distance between the hydraulic lines of the steering system 900 is relatively reasonable, improving system efficiency. It also reduces obstruction of airflow to the engine radiator 810, facilitating ventilation and heat dissipation. Specifically, the steering system 900 includes a connected electric steering pump and a steering gear, with the electric steering pump positioned between the engine radiator 810 and the engine 210.

[0090] In one embodiment of this utility model, reference is made to Figure 16 and Figure 17 The vehicle chassis also includes a range extender suspension beam 1010, a range extender suspension bracket 1020, a first damping pad, and a second damping pad. The range extender suspension beam 1010 is connected to the vehicle frame 100 and supported below the engine 210. The first damping pad is disposed between the range extender suspension beam 1010 and the engine 210. Two range extender suspension brackets 1020 are provided along the width of the vehicle frame 100. Both range extender suspension brackets 1020 are connected to the vehicle frame 100 and supported below the generator 220. The second damping pad is disposed between the engine 210 and the range extender suspension bracket 1020. This allows for a three-point mounting of the range extender assembly: one end of the engine 210 is fixed to the range extender mounting beam, the other end of the engine 210 is connected to the generator 220, and both ends of the generator 220 along the width of the frame 100 are fixed to the frame 100 via a range extender mounting bracket 1020. Optionally, the range extender mounting beam 1010 connects the left and right longitudinal beams of the frame 100, and a first vibration damping pad is provided in the middle of the range extender mounting beam 1010 to absorb vibrations from the engine 210 during operation and reduce noise. The range extender mounting bracket 1020 is a U-shaped plate, with one side connected to the bottom surface of the frame 100 and the other side connected to the top surface of the frame 100. This allows for a fixed connection to the frame 100 in both the vertical and horizontal directions, improving the reliability of supporting the generator 220. The second vibration damping pad is installed between the range extender suspension bracket 1020 and the generator 220, which can absorb the vibration of the generator 220 during operation and reduce noise.

[0091] In one embodiment of this utility model, reference is made to Figure 3 and Figure 8The vehicle chassis also includes a battery controller 1110 and a main / auxiliary drive controller 1120. The battery controller 1110 and the main / auxiliary drive controller 1120 are spaced apart along the height direction of the frame 100 on the battery frame 410. The battery controller 1110 is connected to the power battery 420. It is understood that the battery controller 1110 and the main / auxiliary drive controller 1120 are both integrated inside the battery frame 410. The power battery 420 is located in the middle of the battery frame 410, and the battery controller 1110 and the main / auxiliary drive controller 1120 are located on one side of the power battery 420. This allows for full utilization of the space in the battery frame 410 and improves the compactness of the component arrangement. In this embodiment, the main and auxiliary drive controller 1120 integrates a motor controller, which can control the working state of the power motor; it also integrates a high-voltage control module, which can control the on / off state of the high-voltage circuit; it also integrates a DC-DC converter, which can convert high-voltage DC to low-voltage DC to provide low-voltage power supply for the whole vehicle; and it can also provide AC power for the operation of the electric steering pump motor and the motor inverter of the brake air compressor.

[0092] To achieve the above objectives, this utility model provides an automobile, which includes the vehicle chassis described above. Specifically, the specific structure of the vehicle chassis refers to the above embodiments. Since this automobile adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. In one embodiment, the automobile can be a sanitation vehicle or an ordinary automobile.

[0093] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model embodiments. Any equivalent structural transformations made under the technical concept of the present utility model using the description and drawings of the present utility model embodiments, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model embodiments.

Claims

1. A vehicle chassis, characterized in that, The vehicle chassis includes: Frame; A range extender assembly, the range extender assembly including a connected engine and a generator; A methanol supply system is connected to the engine; A power system, comprising a battery frame and a power battery mounted on the battery frame, wherein the power battery is electrically connected to the generator; and A battery thermal management system includes an electric heater and battery piping connected to the electric heater. The battery piping is in contact with the power battery. The electric heater is located on the vehicle frame and below the cab. The battery frame is located behind the cab. The battery thermal management system and the cab's air conditioning system share the electric heater. The battery frame is located behind the cab.

2. The vehicle chassis as described in claim 1, characterized in that, The battery thermal management system also includes a heat exchanger, and the electric heater and the battery pipeline are both connected to the heat exchanger. The circulating water in the battery pipeline exchanges heat with the circulating water in the heat exchanger.

3. The vehicle chassis as described in claim 2, characterized in that, The vehicle chassis also includes an air conditioning condenser mounted on the frame, and the battery thermal management system further includes: A battery expansion tank is provided on the battery frame and is used to store coolant; A refrigeration unit is connected to the battery expansion tank. The coolant in the refrigeration unit is cooled by the refrigerant in the air conditioner condenser. The refrigeration unit, the heat exchanger, and the battery expansion tank are connected in series through the battery pipeline.

4. The vehicle chassis as described in claim 1, characterized in that, The methanol supply system includes a mounting bracket and a methanol tank mounted on the mounting bracket. The mounting bracket is connected to the side of the vehicle frame and is located on the outside of the vehicle frame. The mounting bracket covers at least two sides of the methanol tank. The methanol tank is connected to the engine to provide fuel to the engine.

5. The vehicle chassis as described in claim 4, characterized in that, The methanol supply system further includes a support member that protrudes from the surface of the mounting bracket facing the vehicle frame and is connected to the bottom surface of the vehicle frame; and / or, the methanol supply system further includes a strap that is attached to the outer peripheral surface of the methanol tank and connected to the mounting bracket.

6. The vehicle chassis as described in claim 1, characterized in that, The vehicle chassis also includes an exhaust system, which includes a muffler and an exhaust pipe connected to the muffler. The exhaust pipe is connected to the engine. The muffler is located inside the vehicle frame. Both the exhaust pipe and / or the muffler are connected to the vehicle frame.

7. The vehicle chassis as described in claim 6, characterized in that, The muffler includes a muffler body and a heat insulation layer sleeved on the outer periphery of the muffler body. The muffler body is a cylindrical muffler.

8. The vehicle chassis as described in claim 7, characterized in that, The muffler also includes a muffler mounting bracket and a clamp connected to the muffler mounting bracket, the clamp being fitted onto the outside of the muffler body; and / or, the exhaust system also includes an exhaust pipe bracket, the exhaust pipe bracket being connected to the vehicle frame and supported below the exhaust pipe.

9. The vehicle chassis as described in claim 1, characterized in that, The battery frame is a sheet metal assembly structure.

10. The vehicle chassis as described in claim 1, characterized in that, The power system also includes a mounting base plate that connects the battery frame and the vehicle frame.

11. The vehicle chassis as described in claim 1, characterized in that, The vehicle chassis also includes a drive system, which includes a drive motor. The generator and the power battery are both electrically connected to the drive motor, and the drive motor is fixed to the vehicle frame through a motor mounting structure.

12. The vehicle chassis as described in claim 11, characterized in that, The motor mounting structure includes a motor bracket and a buffer pad. The motor bracket is connected to the vehicle frame, the buffer pad is disposed between the motor bracket and the vehicle frame, and the drive motor is connected to the motor bracket.

13. The vehicle chassis as described in claim 1, characterized in that, The vehicle chassis also includes an engine cooling system, which includes an engine radiator and an engine expansion tank connected to the engine radiator. The engine radiator is located in front of the range extender assembly and connected to the vehicle frame, and the engine expansion tank is located on the battery frame.

14. The vehicle chassis as described in claim 13, characterized in that, The vehicle chassis also includes a steering system, which is connected to the frame and located between the engine radiator and the engine.

15. The vehicle chassis as described in claim 1, characterized in that, The vehicle chassis also includes a range extender suspension beam, a range extender suspension bracket, a first damping pad, and a second damping pad. The range extender suspension beam is connected to the vehicle frame and supported below the engine. The first damping pad is located between the range extender suspension beam and the engine. Two range extender suspension brackets are provided along the width of the vehicle frame. Both range extender suspension brackets are connected to the vehicle frame and supported below the generator. The second damping pad is located between the engine and the range extender suspension bracket.

16. The vehicle chassis as described in claim 1, characterized in that, The vehicle chassis also includes a battery controller and a main and auxiliary drive controller, which are spaced apart on the battery frame along the height direction of the vehicle frame, and the battery controller is connected to the power battery.

17. A car, characterized in that, The vehicle includes a vehicle chassis as described in any one of claims 1 to 16.

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