Frame system formed by applying internal high pressure, automobile and forming process

Abstract

The invention belongs to the field of automobile installation, and particularly relates to an automobile frame system formed through internal high pressure, an automobile and a forming technology. The frame is used for supporting a vehicle body system and connecting a chassis system and comprises a front frame assembly, a middle frame assembly and a rear frame assembly which are connected in the length direction to form a three-section type frame welding assembly. Each of the front frame assembly, the middle frame assembly and the rear frame assembly comprises a group of longitudinal beams, and the group of longitudinal beams are arranged in parallel, are sequentially connected in an inserted mode and are welded through a carbon dioxide gas shielded welding process; a plurality of cross beams are arranged between a group of longitudinal beams in the front frame assembly and a group of longitudinal beams in the rear frame assembly in the length direction, the cross beams and the longitudinal beams are integrally formed through internal high pressure, and the cross beams are fixed to the longitudinal beams through opposite-penetrating type insertion matching and / or additional connection plates and welded through the carbon dioxide gas shielded welding process. According to the method, the problems of poor welding size matching, low welding efficiency, high welding cost and the like of a longitudinal beam and a cross beam of a traditional cold-stamped frame are solved by applying an internal high-pressure forming technology.

Description

Technical Field

[0001] The invention belongs to the field of automobile installation, and in particular relates to a frame system and an automobile and a forming process using internal high pressure forming. Background Art

[0002] Non-load-bearing vehicles usually adopt a non-load-bearing body structure. Its frame system carries the body, motor, battery pack, engine, transmission, front and rear axles, suspension and other assemblies and front and rear traction devices. The frame is a bridge-like structure that spans the off-road vehicle chassis and is the foundation and skeleton of the entire off-road vehicle.

[0003] The function of the frame is to fix the assemblies to keep them in the correct relative position and meet the requirements of the overall layout of the vehicle, the vehicle's load-bearing capacity, and the layout of man and machine. Non-load-bearing vehicles are usually used in relatively bad road conditions, and need to travel on grade roads, rural dirt roads, and roadless areas, such as undulating, muddy, snowy, sandy, and jungle roads, which requires very high structural strength of their frames.

[0004] The structural design of the frame must meet the requirements of practicality and reliability, and also be easy to manufacture and economical. The frame is an important part of non-load-bearing vehicles. The choice of frame structure is related to the achievement of various performances of non-load-bearing vehicles. The frame usually adopts a ladder frame structure. The future development trend of non-load-bearing vehicle frames is: simple structure, lightweight, low material cost, strength and stiffness that can meet the use requirements.

[0005] Although the existing non-load-bearing automobile frame assembly meets the above trend in terms of structure and material, it is very difficult to ensure that the strength and rigidity can meet the design requirements on the basis of feasible layout. Due to the high trafficability and layout requirements of the whole vehicle, it is not easy to ensure that the non-load-bearing automobile frame can not only ensure a simple structure, but also meet the harsh working conditions when driving on unpaved roads. Achieving strength and rigidity is a problem that technicians in this field need to solve. Summary of the invention

[0006] In view of the above problems, the present invention proposes a frame system and automobile and forming process using internal high pressure forming, which are used to support the body system and connect the chassis system, including a front frame assembly, a middle frame assembly and a rear frame assembly, which are connected along the length direction to form a three-section frame welding assembly;

[0007] The front frame assembly, the middle frame assembly and the rear frame assembly each include a set of longitudinal beams, which are arranged parallel to each other and plugged in sequence along the length direction and welded by a carbon dioxide gas shielded welding process;

[0008] A plurality of cross beams are arranged along the length direction between a group of longitudinal beams in the front frame assembly and the rear frame assembly. The cross beams and the longitudinal beams are integrally formed by internal high pressure, and the plurality of cross beams are fixed to the longitudinal beams by plug-in matching and / or additional connecting plates, and are welded by a carbon dioxide gas shielded welding process.

[0009] Preferably, the front frame assembly includes a group of frame front longitudinal beam bodies, which are arranged in parallel with each other, and the front trailer cross beam assembly, the front lower wishbone front cross beam assembly, the front lower wishbone rear cross beam assembly, the gearbox suspension mounting cross beam assembly and the battery protection front cross beam body are sequentially connected between the group of frame front longitudinal beam bodies along the length direction, wherein,

[0010] The front trailer cross beam assembly includes a front trailer hook cross beam body, the bottom end of the group of front longitudinal beam bodies of the frame is welded with a front trailer hook cross beam connecting plate by a carbon dioxide gas shielded welding process, and the two ends of the front trailer hook cross beam body are respectively inserted into a group of front trailer hook cross beam connecting plates by a carbon dioxide gas shielded welding process;

[0011] The front lower wishbone front cross beam assembly and the front lower wishbone rear cross beam assembly each include a first cross beam body and a group of first connecting plates, the first cross beam body is in a U-shaped frame structure, and the top end is welded to the group of first connecting plates by a carbon dioxide gas shielded welding process, and the other end of the group of first connecting plates is respectively welded to a group of front longitudinal beam bodies of the frame by a carbon dioxide gas shielded welding process;

[0012] The gearbox suspension mounting crossbeam assembly includes a gearbox suspension mounting crossbeam body and a gearbox suspension mounting crossbeam connecting plate. The gearbox suspension mounting crossbeam body is in a U-shaped bracket structure. The top of the U-shaped bracket is respectively welded to a group of front longitudinal beam bodies of the frame by a carbon dioxide gas shielded welding process, and the bottom of the U-shaped bracket is welded to a group of crossbeam connecting plates by a carbon dioxide gas shielded welding process; the two ends of the gearbox suspension mounting crossbeam connecting plate are respectively welded to the gearbox suspension mounting crossbeam body and the front longitudinal beam body of the frame by a carbon dioxide gas shielded welding process;

[0013] The two ends of the battery protection front cross beam body are overlapped with a set of front longitudinal beam bodies of the frame and welded by a carbon dioxide gas shielded welding process;

[0014] A set of front longitudinal beam bodies of the vehicle frame, a front trailer hook beam body, a first beam body, a gearbox suspension mounting beam body and a battery protection front beam body are all formed in one piece by internal high pressure.

[0015] Preferably, the middle frame assembly includes a group of frame middle longitudinal beam bodies, which are respectively plugged with a group of frame front longitudinal beam bodies along the length direction and welded by a carbon dioxide gas shielded welding process. The group of frame middle longitudinal beam bodies are high-pressure integrally formed.

[0016] Preferably, the rear frame assembly includes a group of frame rear longitudinal beam bodies, which are arranged in parallel with each other, and a group of frame rear longitudinal beam bodies are respectively plugged with a group of frame middle longitudinal beam bodies along the length direction and welded by a carbon dioxide gas shielded welding process, and a group of frame rear longitudinal beam bodies are sequentially connected along the length direction with a fuel tank installation front beam assembly, a fuel tank installation rear beam assembly, a gas tank installation beam assembly, an air pump installation beam assembly and a rear anti-collision beam assembly, wherein,

[0017] The fuel tank installation front crossbeam assembly and the air pump installation crossbeam assembly both include a second crossbeam body, and both ends are respectively inserted into a set of rear longitudinal beam bodies of the frame in a through-type manner, and are welded by a carbon dioxide gas shielded welding process;

[0018] The fuel tank installation rear cross beam assembly includes a fuel tank installation rear cross beam body, the fuel tank installation rear cross beam body is in a U-shaped frame structure, and the top end of the fuel tank installation rear cross beam body is overlapped with one end of a group of fuel tank installation rear cross beam connecting plates, and is welded by a carbon dioxide gas shielded welding process, and the other end of a group of fuel tank installation rear cross beam connecting plates extends to the inner edge surface of the rear longitudinal beam body of the frame, and is welded by a carbon dioxide gas shielded welding process;

[0019] The gas tank mounting crossbeam assembly comprises a gas tank mounting crossbeam body, both ends of which are respectively inserted into a set of rear longitudinal beam bodies of the frame in a through-type manner, and a gas tank mounting crossbeam connecting plate with an L-shaped cross section is arranged around the insertion part, and the fitting surface is welded by a carbon dioxide gas shielded welding process;

[0020] The rear anti-collision beam assembly includes a rear anti-collision beam cross beam body, the two ends of the rear anti-collision beam cross beam body are inserted into a group of frame rear longitudinal beam bodies, and the rear anti-collision beam cross beam connecting inner plates and rear anti-collision beam cross beam connecting outer plates are arranged obliquely at the two side corners, and the plate faces are extended and laminated to the frame rear longitudinal beam body and the rear anti-collision beam cross beam body, and are welded by a carbon dioxide gas shielded welding process;

[0021] The group of vehicle frame rear longitudinal beam bodies, the second cross beam body, the fuel tank installation rear cross beam body, the gas tank installation cross beam body and the rear anti-collision beam cross beam body are all formed in one piece under internal high pressure.

[0022] Preferably, the front frame assembly further includes a front trailer hook, a front anti-collision beam mounting plate and a front shock tower mounting plate, wherein:

[0023] With the end face of the front trailer hook cross beam connecting plate away from the rear frame assembly as the front, the front trailer hook is connected to the front end face of the front trailer hook cross beam connecting plate, and the front anti-collision beam mounting plate is connected to the front end face of the front longitudinal beam body of the frame, and the front shock tower mounting plate is connected to the outer side wall of the front longitudinal beam body of the frame.

[0024] Preferably, the mid-frame assembly further includes a battery pack mounting plate, the longitudinal beam bodies of the group of frames are expanded under high pressure to form a closed ring shape in cross section, and the battery pack mounting plate is installed in the ring cavity.

[0025] Preferably, the rear frame assembly further includes a fuel tank mounting limit beam, a rear shock tower, a rear spring seat and a rear trailer hook, wherein:

[0026] The second crossbeam body on the fuel tank installation front crossbeam assembly is the fuel tank installation front crossbeam body;

[0027] With the end face of the rear longitudinal beam body of the frame far away from the front frame assembly as the rear, there are two fuel tank installation limiting cross beams, which are arranged in parallel, and the two ends are respectively installed on the fuel tank installation front cross beam body and the fuel tank installation rear cross beam body, a group of frame rear longitudinal beam bodies are installed with a rear shock tower in the middle of the outer side, a group of frame rear longitudinal beam bodies located behind the rear shock tower are installed with a rear spring seat at the bottom end, and a rear trailer hook is arranged on the rear end face of the frame rear longitudinal beam body.

[0028] Preferably, the front frame assembly, the middle frame assembly and the rear frame assembly further include a plurality of brackets, which can be arranged on corresponding first mounting points as required.

[0029] The present application also claims protection for a car which is applied to the frame system, and the car body is supported by the frame system.

[0030] The application also claims a method of applying an internal high pressure forming process to the frame system, including hardening the crossbeams and longitudinal beams of the frame system by at least two processes of tube making and forming.

[0031] Beneficial Effects

[0032] 1. The non-load-bearing automobile frame structure assembly formed by the installation method of the present invention uses the internal high pressure forming technology to create a flexible combination frame structure system design method for non-load-bearing automobile frame longitudinal beams and cross beams, which solves the problems of poor welding size matching, low welding efficiency, high welding cost, uncontrolled welding thermal deformation, reduction of welding orthopedic tooling, and fatigue cracking of weld structures caused by the traditional cold-stamped frame longitudinal beams and cross beams being welded in two U-shaped cold-stamped combinations.

[0033] 2. At the same time, the high pressure forming process is processed twice by tube making and forming to effectively improve the structural strength by about 20%. The longitudinal beams and cross beams of the frame assembly adopt the high pressure forming process. Compared with the longitudinal beams and cross beams of the traditional cold stamping and welding combination, the number of parts is reduced by 50%, and the welding overlap edges of the traditional frame longitudinal beams and cross beams are cancelled, which effectively reduces the weight by 10% and the frame assembly splicing welding cost by 40%. At the same time, the cold stamping mold development of the longitudinal beams and cross beams is reduced by 50%, reducing the manufacturing cost of the frame longitudinal beams and cross beams.

[0034] 3. Not only that, the longitudinal beams and cross beams are all made of internal high pressure forming technology, and the frame assembly is connected through the cross beams and longitudinal beams. According to different positions and functions, a through-type plug-in matching structure is adopted, and a connecting plate is added to bridge the key connection between the longitudinal beams and the cross beams. The welding is carried out through the carbon dioxide gas shielded welding process, thereby achieving a higher overall strength effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of a frame system using high pressure forming in an embodiment of the present invention is shown;

[0037] Figure 2 A schematic diagram of the front impact force of the frame system in an embodiment of the present invention is shown;

[0038] Figure 3 A schematic diagram of the force of the side impact of the frame system in an embodiment of the present invention is shown;

[0039] Figure 4 A schematic diagram of a cross section of a prior art longitudinal beam in an embodiment of the present invention is shown;

[0040] Figure 5 A top view of a frame system using high pressure forming in an embodiment of the present invention is shown;

[0041] Figure 6 A schematic diagram of a front frame assembly in an embodiment of the present invention is shown;

[0042] Figure 7 A schematic diagram showing the distribution of brackets on the front frame assembly in an embodiment of the present invention is shown;

[0043] Figure 8 A schematic cross-sectional view of a front trailer cross beam assembly in an embodiment of the present invention is shown;

[0044] Fig. 9 A schematic cross-sectional view of a front lower wishbone front crossbeam assembly in an embodiment of the present invention is shown;

[0045] Fig.10 A schematic diagram of a front lower wishbone and rear crossbeam assembly in an embodiment of the present invention is shown;

[0046] Fig.11 A schematic diagram of a gearbox suspension mounting crossbeam assembly in an embodiment of the present invention is shown;

[0047] Fig.12 A schematic diagram showing the connection between the battery protection front cross beam body and the front longitudinal beam body of the vehicle frame in an embodiment of the present invention is shown;

[0048] Fig.13 A schematic diagram of a vehicle frame assembly in an embodiment of the present invention is shown;

[0049] Fig.14 A schematic diagram of a rear frame assembly in an embodiment of the present invention is shown;

[0050] Fig.15 A schematic diagram showing the distribution of brackets on the rear frame assembly in an embodiment of the present invention is shown;

[0051] Fig.16 It shows a cross-sectional schematic diagram of a front crossbeam assembly installed on a fuel tank in an embodiment of the present invention;

[0052] Fig.17 It shows a cross-sectional schematic diagram of the cross beam assembly after the fuel tank is installed in the embodiment of the present invention;

[0053] Fig.18 A schematic cross-sectional view of a gas storage tank installation crossbeam assembly according to an embodiment of the present invention is shown;

[0054] Fig.19 A schematic cross-sectional view of an air pump mounting crossbeam assembly according to an embodiment of the present invention is shown;

[0055] Fig. 20 A schematic cross-sectional view of a rear anti-collision beam assembly in an embodiment of the present invention is shown.

[0056] In the figure,

[0057] 1. Front frame assembly; 11. Front longitudinal beam of the frame; 12. Front cross beam of the battery protection;

[0058] 13. Front trailer crossbeam assembly; 130. Front trailer hook crossbeam body; 131. Front trailer hook crossbeam connecting plate;

[0059] 1N0, first beam body; 1N1, first connecting plate;

[0060] 14. Front lower wishbone front crossbeam assembly; 140. Front lower wishbone front crossbeam body; 141. Front lower wishbone front crossbeam connecting plate;

[0061] 15. Front lower wishbone rear crossbeam assembly; 150. Front lower wishbone rear crossbeam body; 151. Front lower wishbone rear crossbeam connecting plate;

[0062] 16. Transmission suspension mounting crossbeam assembly; 160. Transmission suspension mounting crossbeam body; 161. Transmission suspension mounting crossbeam connecting plate; 162. Crossbeam connecting plate;

[0063] 110, front trailer hook; 111, front anti-collision beam mounting plate; 120, front shock tower mounting plate;

[0064] 112. Engine suspension mounting bracket; 113. Front suspension lower arm limit bracket; 114. Front suspension lower arm rear mounting bracket; 115. Front stabilizer bar mounting bracket; 116. First body suspension bushing bracket; 117. Second body suspension bushing bracket; 118. Second body suspension bushing bracket; 119. Front suspension lower arm front mounting bracket;

[0065] 2. Middle frame assembly; 21. Middle longitudinal beam body of the frame; 210. Battery pack mounting plate; 211. Third body suspension bushing bracket;

[0066] 3. Rear frame assembly; 31. Rear longitudinal beam body of the frame;

[0067] 3n0, second beam body;

[0068] 32. Install the front crossbeam assembly on the fuel tank; 320. Install the front crossbeam body on the fuel tank;

[0069] 33. After the fuel tank is installed, the crossbeam assembly; 330. After the fuel tank is installed, the crossbeam body; 331. After the fuel tank is installed, the crossbeam connecting plate;

[0070] 34. Gas tank installation beam assembly; 340. Gas tank installation beam body; 341. Gas tank installation beam connecting plate;

[0071] 35. Air pump mounting crossbeam assembly; 350. Air pump mounting beam body;

[0072] 36. Rear anti-collision beam assembly; 360. Rear anti-collision beam crossbeam body; 361. Rear anti-collision beam crossbeam connected to inner plate; 362. Rear anti-collision beam crossbeam connected to outer plate;

[0073] 310, fuel tank installation limit beam; 311, rear shock tower; 312, rear spring seat; 313, rear trailer hook;

[0074] 314, rear towing bracket of lift; 315, fourth vehicle body suspension bushing bracket; 316, front mounting bracket of rear subframe; 317, front mounting bracket of rear suspension upper wishbone; 318, rear mounting bracket of rear suspension upper wishbone; 319, rear mounting bracket of rear subframe; 319a, fifth vehicle body suspension bushing bracket. DETAILED DESCRIPTION

[0075] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0076] refer to Figure 1 , Figure 1 A schematic diagram of a vehicle frame system using high pressure forming in an embodiment of the present invention is shown; Figure 1 A frame system using high pressure forming is described, which is used to support the vehicle body, including a front frame assembly 1, a middle frame assembly 2 and a rear frame assembly 3, which are connected along the length direction to form a three-section frame welding assembly;

[0077] refer to Figure 2 and Figure 3 , Figure 2 It shows a schematic diagram of the front impact force of the frame system in the embodiment of the present invention; Figure 3 The schematic diagram of the impact force on the side of the frame system in the embodiment of the present invention is shown; it can be clearly seen in the figure that the front frame assembly 1, the middle frame assembly 2 and the rear frame assembly 3 each include a set of longitudinal beams, which are arranged parallel to each other and plugged in sequence along the length direction and welded by a carbon dioxide gas shielded welding process;

[0078] A plurality of cross beams are arranged along the length direction between a group of longitudinal beams in the front frame assembly 1 and the rear frame assembly 3. The cross beams and the longitudinal beams are integrally formed by internal high pressure, and a plurality of cross beams are fixed to the longitudinal beams by plug-in matching and / or additional connecting plates, and are welded by a carbon dioxide gas shielded welding process.

[0079] In this application, a flexible combined frame structure system design method of non-load-bearing automobile frame longitudinal beams and cross beams is first created by using internal high pressure forming technology, which can be referred to here Figure 4 , Figure 4 The cross section of the longitudinal beam in the prior art and the cross section of the longitudinal beam in the present application are shown; it can be clearly seen that the cross section of the longitudinal beam in the prior art is formed by welding two split U-shaped beams.

[0080] The longitudinal beam of the present application is formed by internal high-pressure expansion, and its cross section is an integral sealed ring.

[0081] Therefore, the present application solves the problems of poor CO2 welding size matching, low welding efficiency, high welding cost, uncontrolled welding thermal deformation, reduction of welding orthopedic tooling, and fatigue cracking of weld structures caused by the two U-shaped cold-stamped welding combinations of the traditional cold-stamped frame longitudinal beams and cross beam bodies.

[0082] In addition, the high-pressure forming process effectively improves the structural strength by about 20% through two rounds of hardening of pipe making and forming. The main longitudinal beam and cross beam of the frame assembly adopt internal high-pressure forming process. The number of parts is reduced by 50% compared with the longitudinal beams and cross beams of traditional cold stamping and welding. The welding overlapping edges of the traditional frame longitudinal beams and cross beam bodies are eliminated, the weight is effectively reduced by 10%, and the cost of frame assembly splicing and welding is reduced by 40%. At the same time, the cold stamping mold development of longitudinal beams and cross beams is reduced by 50%, thereby reducing the manufacturing cost of frame longitudinal beams and cross beams.

[0083] It also combines the connection between the crossbeam and the longitudinal beam according to different positions and functions, adopts a through-type plug-in matching structure, adds a connecting plate to bridge the key connection between the longitudinal beam and the crossbeam, and uses CO2 welding to further enhance its strength and connection stability.

[0084] refer to Figure 5 and Figure 6 , Figure 5 A top view of a frame system using high pressure forming in an embodiment of the present invention is shown; Figure 6 A schematic diagram of a front frame assembly in an embodiment of the present invention is shown; Figure 5 The schematic diagram describes that the front frame assembly 1 includes a group of frame front longitudinal beam bodies 11, which are arranged parallel to each other, and the front trailer cross beam assembly 13, the front lower wishbone front cross beam assembly 14, the front lower wishbone rear cross beam assembly 15, the gearbox suspension mounting cross beam assembly 16 and the battery protection front cross beam body 12 are sequentially connected between the group of frame front longitudinal beam bodies 11 along the length direction.

[0085] The front frame assembly 1 also includes a front trailer hook 110, a front anti-collision beam mounting plate 111 and a front shock tower mounting plate 120, with the end face of the front trailer hook cross beam connecting plate 131 away from the rear frame assembly 3 as the front, the front trailer hook 110 is connected to the front end face of the front trailer hook cross beam connecting plate 131, and the front anti-collision beam mounting plate 111 is connected to the front end face of the frame front longitudinal beam body 11, and the front shock tower mounting plate 120 is connected to the outer side wall of the frame front longitudinal beam body 11.

[0086] refer to Figure 7 , Figure 7 The schematic diagram of the distribution of the upper brackets of the front frame assembly in the embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that the front frame assembly 1 also includes an engine suspension mounting bracket 112, a front suspension lower arm limit bracket 113, a front suspension lower arm rear mounting bracket 114, a front stabilizer bar mounting bracket 115, a first body suspension bushing bracket 116, a second body suspension bushing bracket 117, a second body suspension bushing bracket 118 and a front suspension lower arm front mounting bracket (119), and the above brackets are respectively installed at corresponding positions according to different vehicle models and sizes.

[0087] refer to Figure 8 , Figure 8 The cross-sectional schematic diagram of the front trailer cross beam assembly in the embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that the front trailer cross beam assembly 13 includes a front trailer hook cross beam body 130, a front trailer hook cross beam connecting plate 131 is welded to the bottom end of a group of frame front longitudinal beam bodies 11 by a carbon dioxide gas shielded welding process, and the two ends of the front trailer hook cross beam body 130 are respectively inserted into a group of front trailer hook cross beam connecting plates 131 by a carbon dioxide gas shielded welding process;

[0088] The front lower wishbone front cross beam assembly (14) and the front lower wishbone rear cross beam assembly (15) both comprise a first cross beam body (1N0) and a group of first connecting plates (1N1); the first cross beam body (1N0) is in a U-shaped frame structure, and the top end is welded to the group of first connecting plates (1N1) by a carbon dioxide gas shielded welding process, and the other end of the group of first connecting plates (1N1) is respectively welded to a group of front longitudinal beam bodies (11) of the vehicle frame by a carbon dioxide gas shielded welding process;

[0089] The front lower wishbone front crossbeam assembly (14) and the front lower wishbone rear crossbeam assembly (15) will be described separately below:

[0090] refer to Fig. 9 , Fig. 9 The schematic cross-sectional view of the front lower fork arm front cross beam assembly in the embodiment of the present invention is shown; it can be clearly seen from the schematic view that the front lower fork arm front cross beam assembly 14 comprises a front lower fork arm front cross beam body 140 and a group of front lower fork arm front cross beam connecting plates 141, the front lower fork arm front cross beam body 140 is in a U-shaped frame structure, and the top end is carbon dioxide welded to one end of a group of front lower fork arm front cross beam connecting plates 141, and the other end of a group of front lower fork arm front cross beam connecting plates 141 is respectively welded to a group of vehicle frame front longitudinal beam bodies 11 by a carbon dioxide gas shielded welding process;

[0091] refer to Fig.10 , Fig.10 The schematic diagram of the front lower fork arm rear cross beam assembly in the embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that the front lower fork arm rear cross beam assembly 15 includes a front lower fork arm rear cross beam body 150 and a group of front lower fork arm rear cross beam connecting plates 151, the front lower fork arm rear cross beam body 150 is in a U-shaped frame structure, the top end is respectively welded to one end of a group of front lower fork arm rear cross beam connecting plates 151 by a carbon dioxide gas shielded welding process, and the other end of a group of front lower fork arm rear cross beam connecting plates 151 is respectively welded to a group of frame front longitudinal beam bodies 11 by a carbon dioxide gas shielded welding process;

[0092] refer to Fig.11 , Fig.11The schematic diagram of the gearbox suspension mounting crossbeam assembly in the embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that the gearbox suspension mounting crossbeam assembly 16 includes a gearbox suspension mounting crossbeam body 160 and a gearbox suspension mounting crossbeam connecting plate 161, the gearbox suspension mounting crossbeam body 160 is a U-shaped bracket structure, the top of the U-shaped bracket is respectively welded to a group of frame front longitudinal beam bodies 11 by a carbon dioxide gas shielded welding process, and the bottom of the U-shaped bracket is welded to a group of crossbeam connecting plates 162 by a carbon dioxide gas shielded welding process; the two ends of the gearbox suspension mounting crossbeam connecting plate 161 are respectively welded to the gearbox suspension mounting crossbeam body 160 and the frame front longitudinal beam body 11 by a carbon dioxide gas shielded welding process;

[0093] The two ends of the battery protection front cross beam body 12 are overlapped with a set of frame front longitudinal beam bodies 11 and welded by a carbon dioxide gas shielded welding process;

[0094] A group of vehicle frame front longitudinal beam bodies 11, front trailer hook beam bodies 130, front lower wishbone front beam bodies 140, front lower wishbone rear beam bodies 150, gearbox suspension mounting beam bodies 160 and battery protection front beam bodies 12 are all formed in one piece by internal high pressure.

[0095] refer to Fig.12 , Fig.12 A schematic diagram of the connection between the battery protection front cross beam body and the frame front longitudinal beam body in an embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that the middle frame assembly 2 includes a group of frame middle longitudinal beam bodies 21, which are respectively plugged into a group of frame front longitudinal beam bodies 11 along the length direction, and are welded by a carbon dioxide gas shielded welding process. A group of frame middle longitudinal beam bodies 21 are formed in one piece with internal high pressure.

[0096] The middle frame assembly 2 also includes a battery pack mounting plate 210. A set of middle longitudinal beam bodies 21 of the frame are expanded under high pressure to form a closed ring-shaped cross section, and the battery pack mounting plate 210 is installed in the ring cavity.

[0097] The middle frame assembly 2 further comprises a third vehicle body suspension bushing bracket 211 , which is installed at corresponding positions according to different vehicle models and sizes.

[0098] refer to Fig.13 , Fig.13 FIG. 1 shows a schematic diagram of a vehicle frame assembly in an embodiment of the present invention; FIG. Fig.14 , Fig.14 A schematic diagram of a rear frame assembly in an embodiment of the present invention is shown; Fig.13It can be clearly seen that the rear frame assembly 3 includes a group of frame rear longitudinal beam bodies 31, which are arranged parallel to each other. A group of frame rear longitudinal beam bodies 31 are respectively plugged with a group of frame middle longitudinal beam bodies 21 along the length direction and welded by a carbon dioxide gas shielded welding process. A group of frame rear longitudinal beam bodies 31 are sequentially connected along the length direction with a fuel tank installation front cross beam assembly 32, a fuel tank installation rear cross beam assembly 33, a gas tank installation cross beam assembly 34, an air pump installation cross beam assembly 35 and a rear anti-collision beam assembly 36.

[0099] The rear frame assembly 3 also includes a fuel tank installation limiting cross beam 310, a rear shock tower 311, a rear spring seat 312 and a rear trailer hook 313. With the end face of the frame rear longitudinal beam body 31 far away from the front frame assembly 1 as the rear, there are two fuel tank installation limiting cross beams 310, which are arranged in parallel, and the two ends are respectively installed on the fuel tank installation front cross beam body 320 and the fuel tank installation rear cross beam body. A group of frame rear longitudinal beam bodies are installed with a rear shock tower 311 in the middle of the outer side, a group of frame rear longitudinal beam bodies located behind the rear shock tower 311 are installed with a rear spring seat 312 at the bottom end, and a rear trailer hook 313 is arranged on the rear end face of the frame rear longitudinal beam body.

[0100] refer to Fig.15 , Fig.15 The diagram shows the distribution of the brackets on the rear frame assembly in the embodiment of the present invention; it can be clearly seen from the diagram that the rear frame assembly 3 also includes a lift rear towing bracket 314, a fourth vehicle body suspension bushing bracket 315, a rear subframe front mounting bracket 316, a rear suspension upper fork arm front mounting bracket 317, a rear suspension upper fork arm rear mounting bracket 318, a rear subframe rear mounting bracket 319 and a fifth vehicle body suspension bushing bracket 319a, and the above brackets are installed at corresponding positions according to different vehicle models and sizes.

[0101] The oil tank installation front crossbeam assembly (32) and the air pump installation crossbeam assembly (35) both include a second crossbeam body (3n0), and both ends are respectively inserted into a set of vehicle frame rear longitudinal beam bodies (31) in a through-type manner and welded by a carbon dioxide gas shielded welding process;

[0102] The following separately describes the fuel tank installation front crossbeam assembly (32) and the air pump installation crossbeam assembly (35):

[0103] Fig.16 A cross-sectional schematic diagram of a fuel tank mounted front cross beam assembly in an embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that the fuel tank mounted front cross beam assembly 32 includes a fuel tank mounted front cross beam body 320, which is arched, and both ends are respectively inserted into a set of frame rear longitudinal beam bodies 31 in a through-type manner, and are welded by a carbon dioxide gas shielded welding process.

[0104] Fig.17A schematic cross-sectional diagram of a fuel tank mounted rear beam assembly in an embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that the fuel tank mounted rear beam assembly 33 includes a fuel tank mounted rear beam body 330, the fuel tank mounted rear beam body 330 is in a U-shaped frame structure, and the top end of the fuel tank mounted rear beam body 330 is overlapped with one end of a group of fuel tank mounted rear beam connecting plates 331 respectively, and is welded by a carbon dioxide gas shielded welding process, and the other end of a group of fuel tank mounted rear beam connecting plates 331 extends to the inner edge surface of the frame rear longitudinal beam body 31, and is welded by a carbon dioxide gas shielded welding process.

[0105] Fig.18 A cross-sectional schematic diagram of a gas tank mounting crossbeam assembly in an embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that the gas tank mounting crossbeam assembly 34 includes a gas tank mounting crossbeam body 340, both ends of which are respectively inserted into a group of frame rear longitudinal beam bodies 31 in a through-type manner, and a gas tank mounting crossbeam connecting plate 341 with an L-shaped cross section is arranged around the insertion point, and the fitting surface is welded by a carbon dioxide gas shielded welding process.

[0106] Fig.19 A cross-sectional schematic diagram of an air pump mounting crossbeam assembly in an embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that the air pump mounting crossbeam assembly 35 includes an air pump mounting beam body 350, which is in a straight rod configuration, and whose two ends are respectively plugged into a group of rear longitudinal beam bodies 31 of the frame, and are welded by a carbon dioxide gas shielded welding process.

[0107] Fig. 20 The cross-sectional schematic diagram of the rear anti-collision beam assembly in the embodiment of the present invention is shown. It can be clearly seen from the schematic diagram that the rear anti-collision beam assembly 36 includes a rear anti-collision beam cross beam body 360. The two ends of the rear anti-collision beam cross beam body 360 are inserted into a group of frame rear longitudinal beam bodies 31 in a through-type manner, and the rear anti-collision beam cross beam connecting inner plates 361 and rear anti-collision beam cross beam connecting outer plates 362 are arranged obliquely at the two side corners, and the plate faces are extended and bonded to the frame rear longitudinal beam body 31 and the rear anti-collision beam cross beam body 360, and are welded by a carbon dioxide gas shielded welding process;

[0108] A set of rear longitudinal beam bodies 31 of the frame, front cross beam bodies 320 for fuel tank installation, rear cross beam bodies 330 for fuel tank installation, cross beam bodies 340 for gas storage tank installation, and rear anti-collision beam bodies 360 for air pump installation beam bodies 350 are all formed in one piece by high pressure.

[0109] The present application also protects a car whose body is supported by a frame system.

[0110] The present application also protects a method of utilizing an internal high pressure forming process, wherein the crossbeams and longitudinal beams of the frame system are processed and hardened at least twice by tube making and forming to improve the strength performance of the frame.

[0111] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A frame system using high pressure forming for supporting a vehicle body, characterized in that: It comprises a front frame assembly (1), a middle frame assembly (2) and a rear frame assembly (3), which are connected along the length direction to form a three-section frame welding assembly; The front frame assembly (1), the middle frame assembly (2) and the rear frame assembly (3) each include a set of longitudinal beams, which are arranged parallel to each other and are plugged in sequence along the length direction and welded by a carbon dioxide gas shielded welding process; A plurality of cross beams are arranged along the length direction between a group of longitudinal beams in the front frame assembly (1) and the rear frame assembly (3); the cross beams and the longitudinal beams are integrally formed by internal high pressure, and the plurality of cross beams are fixed to the longitudinal beams by plug-in matching and / or additional connection plates, and are welded by a carbon dioxide gas shielded welding process.

2. A vehicle frame system using hydroforming according to claim 1, characterized in that: The front frame assembly (1) comprises a group of frame front longitudinal beam bodies (11) arranged in parallel with each other, and a front trailer cross beam assembly (13), a front lower wishbone front cross beam assembly (14), a front lower wishbone rear cross beam assembly (15), a gearbox suspension mounting cross beam assembly (16) and a battery protection front cross beam body (12) are sequentially connected between the group of frame front longitudinal beam bodies (11) along the length direction, wherein: The front trailer cross beam assembly (13) comprises a front trailer hook cross beam body (130), the bottom end of the group of front longitudinal beam bodies (11) of the frame is welded with a front trailer hook cross beam connecting plate (131) by a carbon dioxide gas shielded welding process, and the two ends of the front trailer hook cross beam body (130) are respectively inserted into a group of front trailer hook cross beam connecting plates (131) by a carbon dioxide gas shielded welding process; The front lower wishbone front cross beam assembly (14) and the front lower wishbone rear cross beam assembly (15) both comprise a first cross beam body (1N0) and a group of first connecting plates (1N1); the first cross beam body (1N0) is in a U-shaped frame structure, and the top end is welded to the group of first connecting plates (1N1) by a carbon dioxide gas shielded welding process, and the other end of the group of first connecting plates (1N1) is respectively welded to a group of front longitudinal beam bodies (11) of the vehicle frame by a carbon dioxide gas shielded welding process; The gearbox suspension mounting crossbeam assembly (16) comprises a gearbox suspension mounting crossbeam body (160) and a gearbox suspension mounting crossbeam connecting plate (161); the gearbox suspension mounting crossbeam body (160) is in a U-shaped bracket structure; the top of the U-shaped bracket is respectively welded to a group of vehicle frame front longitudinal beam bodies (11) by a carbon dioxide gas shielded welding process, and the bottom of the U-shaped bracket is welded to a group of crossbeam connecting plates (162) by a carbon dioxide gas shielded welding process; the two ends of the gearbox suspension mounting crossbeam connecting plate (161) are respectively welded to the gearbox suspension mounting crossbeam body (160) and the vehicle frame front longitudinal beam body (11) by a carbon dioxide gas shielded welding process; The two ends of the battery protection front cross beam body (12) are overlapped with a group of vehicle frame front longitudinal beam bodies (11) and welded by a carbon dioxide gas shielded welding process; A group of vehicle frame front longitudinal beam bodies (11), front trailer hook cross beam bodies (130), first cross beam bodies (1N0), gearbox suspension installation cross beam bodies (160) and battery protection front cross beam bodies (12) are all formed in one piece by internal high pressure.

3. A vehicle frame system using hydroforming according to claim 1, characterized in that: The middle frame assembly (2) comprises a set of middle longitudinal beam bodies (21) of the frame, which are respectively plugged into a set of front longitudinal beam bodies (11) of the frame along the length direction and welded by a carbon dioxide gas shielded welding process. The set of middle longitudinal beam bodies (21) of the frame are formed in one piece by high pressure.

4. A vehicle frame system using hydroforming according to claim 1, characterized in that: The rear frame assembly (3) comprises a group of frame rear longitudinal beam bodies (31) arranged in parallel with each other, the group of frame rear longitudinal beam bodies (31) are respectively plugged with a group of frame middle longitudinal beam bodies (21) along the length direction and welded by a carbon dioxide gas shielded welding process, and the group of frame rear longitudinal beam bodies (31) are sequentially connected along the length direction with a fuel tank mounting front cross beam assembly (32), a fuel tank mounting rear cross beam assembly (33), a gas tank mounting cross beam assembly (34), an air pump mounting cross beam assembly (35) and a rear anti-collision beam assembly (36), wherein: The oil tank installation front crossbeam assembly (32) and the air pump installation crossbeam assembly (35) both include a second crossbeam body (3n0), and both ends are respectively inserted into a set of vehicle frame rear longitudinal beam bodies (31) in a through-type manner and welded by a carbon dioxide gas shielded welding process; The fuel tank installation rear cross beam assembly (33) comprises a fuel tank installation rear cross beam body (330), the fuel tank installation rear cross beam body (330) is in a U-shaped frame structure, and the top end of the fuel tank installation rear cross beam body (330) is overlapped with one end of a group of fuel tank installation rear cross beam connecting plates (331) respectively, and is welded by a carbon dioxide gas shielded welding process, and the other end of a group of fuel tank installation rear cross beam connecting plates (331) extends to the inner edge surface of the frame rear longitudinal beam body (31), and is welded by a carbon dioxide gas shielded welding process; The gas tank mounting crossbeam assembly (34) comprises a gas tank mounting crossbeam body (340), both ends of which are respectively inserted into a group of vehicle frame rear longitudinal beam bodies (31) in a through-type manner, and a gas tank mounting crossbeam connecting plate (341) with an L-shaped cross section is arranged around the insertion point, and the fitting surface is welded by a carbon dioxide gas shielded welding process; The rear anti-collision beam assembly (36) comprises a rear anti-collision beam cross beam body (360), the two ends of the rear anti-collision beam cross beam body (360) are inserted into a group of frame rear longitudinal beam bodies (31), and the rear anti-collision beam cross beam connecting inner plates (361) and rear anti-collision beam cross beam connecting outer plates (362) are arranged obliquely at the two side corners, and the plate faces are extended and attached to the frame rear longitudinal beam body (31) and the rear anti-collision beam cross beam body (360), and are welded by a carbon dioxide gas shielded welding process; The group of vehicle frame rear longitudinal beam bodies (31), the second cross beam body (3n0), the oil tank mounting rear cross beam body (330), the gas tank mounting cross beam body (340) and the rear anti-collision beam cross beam body (360) are all formed in one piece by internal high pressure.

5. A vehicle frame system using hydroforming according to claim 2, characterized in that: The front frame assembly (1) further comprises a front trailer hook (110), a front anti-collision beam mounting plate (111) and a front shock tower mounting plate (120), wherein: With the end face of the front trailer hook cross beam connecting plate (131) away from the rear frame assembly (3) as the front, a front trailer hook (110) is connected to the front end face of the front trailer hook cross beam connecting plate (131), a front anti-collision beam mounting plate (111) is connected to the front end face of the front longitudinal beam body (11) of the frame, and a front shock tower mounting plate (120) is connected to the outer side wall of the front longitudinal beam body (11) of the frame.

6. A vehicle frame system using hydroforming according to claim 3, characterized in that: The middle frame assembly (2) further comprises a battery pack mounting plate (210), the middle longitudinal beam body (21) of the group of frames is expanded under high pressure to form a closed ring shape in cross section, and the battery pack mounting plate (210) is mounted in the ring cavity.

7. A vehicle frame system using hydroforming according to claim 4, characterized in that: The rear frame assembly (3) further comprises a fuel tank mounting limit beam (310), a rear shock tower (311), a rear spring seat (312) and a rear trailer hook (313), wherein: The second crossbeam body (3n0) on the oil tank installation front crossbeam assembly (32) is the oil tank installation front crossbeam body (320); With the end face of the rear longitudinal beam body (31) of the frame far away from the front frame assembly (1) as the rear, there are two oil tank installation limit beams (310) which are arranged in parallel, and the two ends are respectively installed on the front transverse beam body (320) of the oil tank installation and the rear transverse beam body of the oil tank installation, a group of rear longitudinal beam bodies of the frame are all installed with a rear shock tower (311) at the middle part of the outer side, a group of rear longitudinal beam bodies of the frame are all installed with a rear spring seat (312) at the bottom end, and a rear trailer hook (313) is arranged on the rear end face of the rear longitudinal beam body of the frame.

8. The vehicle frame system using hydroforming according to claim 1, characterized in that: The front frame assembly (1), the middle frame assembly (2) and the rear frame assembly (3) also include a plurality of brackets which can be arranged at corresponding first mounting points as required.

9. An automobile, applied to the frame system according to any one of claims 1 to 8, characterized in that: The vehicle body is supported by a frame system.

10. A frame system using an internal high pressure forming process, applied to any one of claims 1 to 8, characterized in that: The transverse beams and longitudinal beams comprising the frame system are work-hardened at least twice by tube making and forming.

Images