Vehicle body frame of novel energy-saving prototype vehicle, manufacturing method of vehicle body frame and vehicle

Abstract

The invention discloses a vehicle body frame of a novel energy-saving prototype vehicle, a manufacturing method of the vehicle body frame and the vehicle. The vehicle body frame is of a space truss structure and is formed by assembling metal connecting pieces and metal-carbon fiber composite pipes; the vehicle body frame is divided into a front gantry frame, a passenger compartment frame and a rear compartment frame, the front gantry frame is used for installing a suspension system and a steering system, the passenger compartment frame is used for bearing passengers, and the rear compartment frame is used for installing transmission, braking and power system components; the modules are quickly connected through metal connecting pieces, each module comprises a plurality of metal-carbon fiber composite pipes and metal connecting pieces, and the metal-carbon fiber composite pipes are connected through the metal connecting pieces. The metal connecting pieces and the metal-carbon fiber composite pipes are creatively combined to manufacture the automobile body frame, good effects are achieved in the aspects of light weight, strength, connection reliability, manufacturing process, cost control and the like, and an efficient and reliable automobile light weight design scheme is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle frame structures, and particularly to a body frame and a vehicle of a new energy-saving prototype vehicle. Background Art

[0002] In the context of the increasingly severe global energy crisis and environmental pollution problems, energy conservation and environmental protection have become an important direction for the development of the automotive industry. Carbon fiber tubes, with their high strength and low weight characteristics, have shown great potential in the manufacture of energy-saving vehicles. However, despite the many advantages of carbon fiber tubes, their connection problem has always been a key factor restricting their wide application.

[0003] Traditional connection methods, such as direct adhesive bonding and mechanical connection, may expose problems such as insufficient connection strength and poor durability in the face of complex loads and long-term use. These problems not only affect the application effect of carbon fiber tubes in the manufacture of energy-saving vehicles but also limit the possibility of their further promotion.

[0004] At the same time, traditional energy-saving prototype vehicle frames are mostly composed of steel and aluminum through welding. Although this structure has advantages such as high strength and low cost, its disadvantages of large weight and being unfavorable for energy conservation and emission reduction are becoming increasingly prominent. With the enhancement of environmental awareness and the intensification of energy consumption, the traditional material vehicle frames are already difficult to meet the requirements of the automotive industry for lightweight design.

[0005] In recent years, a series of carbon fiber composite materials have gradually become ideal materials for automotive lightweight design due to their high specific strength, high specific modulus, and light weight. However, the carbon fiber composite materials currently available on the market are not perfect. Their high cost, complex processing technology, and connection difficulties have all restricted their wide application in the manufacture of energy-saving vehicles. In addition, the carbon fiber composite materials currently available on the market are relatively brittle and have poor impact resistance, which also poses challenges in terms of collision safety.

[0006] In order to overcome these disadvantages of existing carbon fiber composite materials, some researchers have begun to try to combine existing carbon fiber composite materials with metal materials. For example, structures such as carbon fiber layers covering the surface of metal skeletons, or mechanical splicing or laminating structures of metals and carbon fibers are used. These methods have reduced the cost to a certain extent and improved the connection strength and impact resistance. However, the connection method between existing carbon fiber composite materials and metal materials is still complex, increasing the manufacturing difficulty and cost. At the same time, since the metal skeleton still occupies a relatively large proportion, the reduction of the overall weight is also limited.

[0007] Therefore, the existing methods of bonding carbon fiber and metal still have problems such as complex connections and limited weight reduction, which have become urgent problems to be solved in the field of lightweight design of energy-saving prototype vehicles. The present invention solves the above defects through the design of composite pipes with a carbon fiber layer coated on the outer wall of a metal pipe. Summary of the Invention

[0008] The object of the present invention is to provide a body frame and a vehicle for a new type of energy-saving prototype vehicle, which constructs the vehicle frame by combining metal connectors and metal-carbon fiber composite pipes, aiming to effectively reduce the weight of the vehicle frame while ensuring the strength, stiffness, and safety of the vehicle frame, improve fuel economy, and achieve energy conservation and emission reduction.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] A body frame for a new type of energy-saving prototype vehicle, the body frame adopts a space truss structure and is assembled by metal connectors and metal-carbon fiber composite pipes; the body frame is divided into three modules: a front gantry frame, a passenger cabin frame, and a rear cabin frame. The front gantry frame is used to install the suspension system and the steering system, the passenger cabin frame is used to carry passengers, and the rear cabin frame is used to install transmission, braking, and power system components;

[0011] The modules are quickly connected by metal connectors. Each module includes a plurality of metal-carbon fiber composite pipes and metal connectors, and the plurality of metal-carbon fiber composite pipes are connected to each other through the metal connectors.

[0012] Further, a back panel is fixedly connected between the passenger cabin frame and the rear cabin frame.

[0013] Further, the metal connectors are made of 7075 aluminum alloy.

[0014] Further, the metal-carbon fiber composite pipes and the metal connectors are fixedly connected by adhesive bonding or mechanical connection.

[0015] Further, the metal-carbon fiber composite pipes are divided into composite pipe cross beams, composite pipe longitudinal beams, composite pipe vertical beams, and composite pipe support beams.

[0016] Further, the metal connectors are divided into gantry connectors, middle connectors, reinforced three-opening connectors, double-opening connectors, and three-opening connectors.

[0017] Further, the metal-carbon fiber composite pipe is a composite pipe with a carbon fiber layer coated on the outer wall of a metal pipe, and both ends of the pipe retain exposed metal pipe segments for insertion into the metal connectors.

[0018] The present invention also provides a manufacturing method for the body frame of a new energy-saving prototype vehicle, which is used to manufacture the body frame of the above-mentioned new energy-saving prototype vehicle, and includes the following steps:

[0019] Manufacture of metal connectors: According to the frame design drawings, cut the aluminum alloy or titanium alloy plates by laser cutting or numerically controlled machine tools, and then form them with a bending machine or a stamping machine to produce connection nodes and connecting plate components. Then, weld them with argon arc welding or laser welding process to form complete metal connectors. Finally, perform anodic oxidation or spray surface treatment on the welded metal connectors;

[0020] Processing of metal-carbon fiber composite pipes: According to the frame design drawings, cut the metal-carbon fiber composite pipes with a cutting machine, grind their end faces to ensure that the connection surfaces are flat, and perform grinding or chemical treatment on the connection parts to improve the bonding strength with the adhesive;

[0021] Assembly of the body frame: Pre-assemble the metal connectors and metal-carbon fiber composite pipes according to the frame design drawings, check the fitting conditions, apply dp460 high-strength structural adhesive on the connection surfaces of the metal connectors, insert the metal-carbon fiber composite pipes into the connection holes of the metal connectors and position and fix them, reinforce them by mechanical connection methods, and put the assembled body frame into a curing furnace for curing to ensure that the adhesive is fully cured to reach the best strength. After curing, disassemble the bolted or riveted strengthening parts to obtain a stable and lightweight body frame.

[0022] Furthermore, the manufacturing method further includes:

[0023] Frame structure design: The front gantry frame is assembled with high-strength aluminum alloy connectors and metal-carbon fiber composite pipes; the passenger compartment frame is assembled with aluminum alloy connectors and metal-carbon fiber composite pipes; the rear compartment frame is assembled with high-strength aluminum alloy connectors and metal-carbon fiber composite pipes.

[0024] The present invention also provides a vehicle, including the body frame of the above-mentioned new energy-saving prototype vehicle.

[0025] According to the specific embodiments provided by the present invention, the following technical effects are disclosed: The body frame of the new energy-saving prototype vehicle and its manufacturing method provided by the present invention adopt a combination of metal connectors and metal-carbon fiber composite pipes to construct the frame. The metal-carbon fiber composite pipes have the characteristics of high strength and low weight, which helps to reduce the overall weight of the vehicle, improve energy efficiency. The metal connectors are used to connect the metal-carbon fiber composite pipes to form a stable body structure. Through the combination of the two, the advantages of both are taken into account, while ensuring the strength, stiffness and safety of the frame, effectively reducing the weight of the frame, improving fuel economy, and saving energy and reducing emissions. Specifically, the beneficial effects of the present invention include the following points:

[0026] 1. Significantly lightweight, improving fuel economy: Using metal-carbon fiber composite pipes as the main load-bearing components and combining with high-strength metal connectors, compared with traditional steel or aluminum body frames, the body weight is greatly reduced, the energy consumption during vehicle driving is reduced, the fuel economy is significantly improved, emissions are reduced, meeting the trend of energy conservation and environmental protection.

[0027] 2. Balancing strength and stiffness to ensure safety: The carbon fiber layer in the metal-carbon fiber composite pipe provides high specific strength and specific modulus. Combining with the rigid support of metal connectors to form a space truss structure, optimizing the force distribution of the body frame. While reducing weight, it ensures the strength and stiffness of the body, meets the vehicle safety performance requirements, and provides better protection in collision accidents.

[0028] 3. Environmentally friendly and energy-saving, in line with the industry development trend: Through lightweight design and efficient connection technology, the energy consumption and emissions of the vehicle are effectively reduced, meeting the development trend of the automotive industry towards energy conservation and environmental protection, with significant social and environmental benefits.

[0029] Through the innovative way of combining metal connectors with metal-carbon fiber composite pipes, the present invention is superior to the prior art in terms of lightweight, strength, connection reliability, manufacturing process and cost control, providing an efficient and reliable solution for automotive lightweight design, with broad application prospects and market value. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the body frame of the new energy-saving prototype vehicle in the embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of the distribution of composite pipe cross beams and vertical beams in the embodiment of the present invention;

[0033] Figure 3 It is a schematic diagram of the distribution of composite pipe longitudinal beams and support beams in the embodiment of the present invention;

[0034] Figure 4 It is an assembly schematic diagram of the vertical beam of the composite pipe and the gantry connector in the embodiment of the present invention;

[0035] Figure 5 It is a schematic diagram of the distribution of metal connectors in the embodiment of the present invention;

[0036] Figure 6 Schematic diagram of the distribution of various types of metal connectors in the embodiments of the present invention;

[0037] Figure 7 Schematic diagram of the distribution of metal connectors behind the backplane in the embodiments of the present invention;

[0038] Figure 8 Schematic diagram of the structure of the metal connector in the embodiments of the present invention;

[0039] Figure 9 Schematic diagram of the structure of the metal-carbon fiber composite pipe in the embodiments of the present invention;

[0040] Description of reference numerals: 1. Metal-carbon fiber composite pipe; 2. Metal connector; 3. Backplane; 1-1. Cross beam of composite pipe; 1-2. Longitudinal beam of composite pipe; 1-3. Vertical beam of composite pipe; 2-1. Gantry connector; 2-2. Middle connector; 2-3. Reinforced three-opening connector; 2-4. Double-opening connector; 2-5. Three-opening connector. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0042] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0043] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0044] The object of the present invention is to provide a body frame for a new type of energy-saving prototype vehicle. By adopting a combination of metal connectors and metal-carbon fiber composite pipes, the problem of difficult connection of metal-carbon fiber composite pipes is solved, and the lightweight design of the vehicle frame is achieved.

[0045] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Embodiment 1

[0047] As Figures 1-9 shown, a body frame for a new type of energy-saving prototype vehicle provided by an embodiment of the present invention. The body frame adopts a space truss structure and is assembled by metal connectors 2 and metal-carbon fiber composite pipes 1. The body frame is divided into three modules: a front gantry frame, a passenger cabin frame, and a rear cabin frame. The front gantry frame is used to install the suspension system and the steering system, the passenger cabin frame is used to carry passengers, and the rear cabin frame is used to install transmission, braking, and power system components.

[0048] The modules are quickly connected by metal connectors 2. Each module includes a plurality of metal-carbon fiber composite pipes 1 and metal connectors 2, and the plurality of metal-carbon fiber composite pipes 1 are connected to each other by the metal connectors 2. Exemplarily, the metal-carbon fiber composite pipes 1 and the metal connectors 2 are fixedly connected by an adhesive or mechanical connection method (such as bolt connection or riveting).

[0049] A back panel 3 is fixedly connected between the passenger cabin frame and the rear cabin frame. The back panel 3 is fixed by bonding to the vehicle frame.

[0050] As Figure 8 shown, the metal connector 2 is a 7075 aluminum alloy connector. 7075 aluminum alloy has characteristics such as high strength, good mechanical properties, and anodic reaction. The metal connector 2 needs to be designed into various shapes, and the corresponding opening specifications are set according to the specifications of the connecting pipes. Each opening is used to insert the corresponding metal-carbon fiber composite pipe. The connectors are divided into gantry connectors 2-1, middle connectors 2-2, reinforced three-opening connectors 2-3, double-opening connectors 2-4, and three-opening connectors 2-5, etc.

[0051] The metal-carbon fiber composite pipes 1 are divided into composite pipe cross beams 1-1, composite pipe longitudinal beams 1-2, composite pipe vertical beams 1-3, and composite pipe support beams 1-4.

[0052] As Figure 9 shown, the metal-carbon fiber composite pipe 1 is a composite pipe with a carbon fiber layer coated on the outer wall of a metal pipe, and both ends of the pipe retain exposed metal pipe sections for insertion into the metal connector 2.

[0053] The body frame of the new energy-saving prototype vehicle provided by the present invention uses metal-carbon fiber composite pipes as the main structural materials to form the basic frame of the vehicle frame. The metal-carbon fiber composite pipes have the characteristics of high strength and low weight, which helps to reduce the overall weight of the vehicle and improve energy efficiency. Metal connectors are used to connect the metal-carbon fiber composite pipes to form a stable body structure. The metal connectors are made of high-strength and corrosion-resistant metal materials to ensure the strength and durability of the connection parts.

[0054] Example 2

[0055] The present invention also provides a manufacturing method for the body frame of a new energy-saving prototype vehicle, which is used to manufacture the body frame of the above new energy-saving prototype vehicle, and includes the following steps:

[0056] S1. Frame structure design: The body frame adopts a space truss structure, which is assembled by metal connectors and metal-carbon fiber composite pipes, and is divided into three modules: a front gantry frame, a passenger compartment frame, and a rear compartment frame. The modules are quickly connected through metal connectors.

[0057] Front gantry frame: It is used to install the suspension system and the steering system, and is assembled with high-strength 6061 aluminum alloy connectors and metal-carbon fiber composite pipes. The 6061 aluminum alloy connectors participate in the suspension connection and have high stiffness and impact resistance.

[0058] Passenger compartment frame: It is used to carry passengers and is assembled with aluminum alloy connectors and metal-carbon fiber composite pipes to provide better safety and comfort while ensuring strength.

[0059] Rear compartment frame: It is used to install system components such as transmission, braking, and power, and is assembled with high-strength aluminum alloy connectors and metal-carbon fiber composite pipes, with high load-bearing capacity.

[0060] S2. Metal connector manufacturing: According to the vehicle frame design drawings, cut the aluminum alloy or titanium alloy plates by laser cutting or numerical control machine tools, and then form them by a bending machine or a stamping machine to produce connection node and connection plate components. Then, use argon arc welding or laser welding technology for welding to form a complete metal connector. Finally, perform anodic oxidation or spraying surface treatment on the welded metal connector to improve corrosion resistance and aesthetics;

[0061] Exemplarily, the metal connector adopts an aluminum alloy connector. According to the connection requirements of the metal-carbon fiber composite pipes, the structure and dimensions of the aluminum alloy connector are designed, including the shape, hole diameter, wall thickness, etc. of the connection node. Use 6061 high-strength aluminum alloy pipes and process them into the required connector shapes through CNC cutting, bending, welding and other processes. Perform surface treatment on the welded aluminum alloy connectors, such as anodic oxidation or spraying, to improve their corrosion resistance and aesthetics.

[0062] S3. Processing of metal-carbon fiber composite pipes: According to the frame design drawings, use a cutting machine to cut the metal-carbon fiber composite pipes, grind their end faces to ensure that the connection surface is flat, and grind or chemically treat the connection parts to improve the bonding strength with the adhesive;

[0063] S4. Body frame assembly: pre-assemble the metal connectors and metal-carbon fiber composite pipes according to the frame design drawings, check the fit, apply dp460 high-strength structural adhesive on the connection surface of the metal connectors, insert the metal-carbon fiber composite pipes into the connection holes of the metal connectors and fix them in place, and reinforce them with mechanical connections, such as bolting or riveting. Put the assembled body frame into a curing oven for curing to ensure that the adhesive is fully cured to achieve the optimal strength. After curing, remove the bolted or riveted reinforcement components to obtain a stable and lightweight body frame.

[0064] Furthermore, the manufacturing method further comprises:

[0065] Frame structure design: The front gantry frame is assembled with high-strength 6061 aluminum alloy connectors and metal-carbon fiber composite pipes; the passenger cabin frame is assembled with aluminum alloy connectors and metal-carbon fiber composite pipes; the rear cabin frame is assembled with high-strength aluminum alloy connectors and metal-carbon fiber composite pipes.

[0066] Example 3

[0067] The present invention also provides a vehicle, comprising the body frame of the novel energy-saving prototype vehicle. Other components of the vehicle are prior art and will not be described in detail herein.

[0068] The present invention creates a new frame structure of metal-carbon fiber composite pipes and metal connectors for energy-saving racing cars, combining the toughness of metal connectors and the rigidity of carbon fiber square tubes. Metal connectors are tough and not prone to brittle deformation, and metal-carbon fiber composite pipes are rigid and strong. The connection between the pipes is welded and spliced through corresponding metal adapters. With the help of argon arc welding and the design of carbon fiber tubes wrapped around metal pipes, the various materials are tightly connected, greatly reducing the weight of the frame and thus reducing energy consumption. The carbon fiber tubes also protect the metal pipes from corrosion, such as corrosion resistance, fatigue resistance, and resistance to brittle deformation, which effectively ensures the long-term use of the vehicle and reduces maintenance costs.

[0069] The present invention not only solves the problem of difficult connection of carbon fiber tubes by combining metal connectors with metal-carbon fiber composite tubes, but also realizes lightweight design of the frame. At the same time, the introduction of metal connectors also improves the overall strength and durability of the frame. This innovative design not only meets the automotive industry's demand for lightweight design, but also provides new ideas and methods for the manufacture of energy-saving vehicles.

[0070] In summary, the present invention provides a new solution for the lightweight design of an energy-saving prototype vehicle. Through the perfect combination of metal connectors and metal-carbon fiber composite pipes, while ensuring the strength, stiffness, and safety of the energy-saving prototype vehicle, effective weight reduction of the vehicle frame and improvement of fuel economy are achieved. This not only helps to promote the development of the automotive industry but also contributes to the solution of the global energy crisis and environmental pollution problems.

[0071] For the remaining technical features in this embodiment, those skilled in the art can flexibly select them according to the actual situation to meet different specific actual needs. However, it is obvious to those of ordinary skill in the art that these specific details do not have to be adopted to implement the present invention. In other instances, well-known components, structures, or parts are not specifically described in order to avoid obscuring the present invention, and all are within the scope of the technical solutions claimed in the claims of the present invention.

[0072] Modifications and changes made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention. In the above description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details do not have to be adopted to implement the present invention. In other instances, well-known technologies, such as specific construction details, operating conditions, and other technical conditions, are not specifically described in order to avoid obscuring the present invention.

[0073] Specific examples are used in this article to illustrate the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. The body frame of a new type of energy-saving prototype vehicle, characterized in that, The body frame adopts a space truss structure and is assembled by metal connectors (2) and metal-carbon fiber composite pipes (1); the body frame is divided into three modules: a front gantry frame, a passenger compartment frame, and a rear compartment frame. The front gantry frame is used to install the suspension system and the steering system, the passenger compartment frame is used to carry passengers, and the rear compartment frame is used to install transmission, braking, and power system components; The modules are quickly connected through metal connectors (2). Each module includes a plurality of metal-carbon fiber composite pipes (1) and metal connectors (2), and the plurality of metal-carbon fiber composite pipes (1) are connected to each other through the metal connectors (2).

2. The body frame of the new energy-saving prototype vehicle according to claim 1, characterized in that, A back plate (3) is fixedly connected between the passenger compartment frame and the rear compartment frame.

3. The body frame of the new energy-saving prototype vehicle according to claim 1, characterized in that, The metal connector (2) is made of 7075 aluminum alloy.

4. The body frame of the new energy-saving prototype vehicle according to claim 1, characterized in that, The metal-carbon fiber composite pipe (1) and the metal connector (2) are fixedly connected by an adhesive or mechanical connection method.

5. The body frame of the new energy-saving prototype vehicle according to claim 1, characterized in that The metal-carbon fiber composite pipe (1) is divided into a composite pipe cross beam (1-1), a composite pipe longitudinal beam (1-2), a composite pipe vertical beam (1-3), and a composite pipe support beam (1-4).

6. The body frame of the new energy-saving prototype vehicle according to claim 1, characterized in that, The metal connector (2) is divided into a gantry connector (2-1), a middle connector (2-2), a reinforced triple-opening connector (2-3), a double-opening connector (2-4), and a triple-opening connector (2-5).

7. The body frame of the new energy-saving prototype vehicle according to claim 1, characterized in that, The metal-carbon fiber composite pipe (1) is a composite pipe with a carbon fiber layer coated on the outer wall of a metal pipe, and both ends of the pipe retain exposed metal pipe sections for insertion into the metal connector (2).

8. A manufacturing method for the body frame of a new energy-saving prototype vehicle, which is used to manufacture the body frame of the new energy-saving prototype vehicle according to any one of claims 1-7, characterized in that, It includes the following steps: Manufacture of metal connectors: According to the frame design drawing, cut the aluminum alloy or titanium alloy plate by laser cutting or numerically controlled machine tool, then form it with a bending machine or a stamping machine to make connection nodes and connecting plate components, and then weld them with argon arc welding or laser welding process to form a complete metal connector. Finally, perform anodic oxidation or spraying surface treatment on the welded metal connector; Processing of metal-carbon fiber composite pipes: According to the frame design drawing, cut the metal-carbon fiber composite pipes with a cutting machine, grind the end faces to ensure the connection surfaces are flat, and perform grinding or chemical treatment on the connection parts to improve the bonding strength with the adhesive; Assembly of the body frame: Pre-assemble the metal connectors and metal-carbon fiber composite pipes according to the frame design drawing, check the fitting situation, apply dp460 high-strength structural adhesive on the connection surfaces of the metal connectors, insert the metal-carbon fiber composite pipes into the connection holes of the metal connectors and position and fix them, reinforce them by mechanical connection method, put the assembled body frame into a curing furnace to cure, ensure that the adhesive is fully cured to reach the best strength, and disassemble the bolt-connected or riveted reinforcement parts after curing to obtain a stable and lightweight body frame.

9. The manufacturing method of the body frame of the new energy-saving prototype vehicle according to claim 1, characterized in that, The manufacturing method further includes: Frame structure design: The front gantry frame is assembled with high-strength aluminum alloy connectors and metal-carbon fiber composite pipes; the passenger compartment frame is assembled with aluminum alloy connectors and metal-carbon fiber composite pipes; the rear compartment frame is assembled with high-strength aluminum alloy connectors and metal-carbon fiber composite pipes.

10. A vehicle, comprising a body frame of the novel energy-saving prototype vehicle according to any one of claims 1-7.

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