A combined longitudinal beam type integrated aluminum alloy vehicle frame

Abstract

This invention belongs to the field of new energy vehicle frame technology, and specifically relates to a combined longitudinal beam type integrated aluminum alloy frame, including a main longitudinal beam and two secondary longitudinal beams disposed on both sides of the main longitudinal beam, and further including: two irregularly shaped outer edge longitudinal beams, which are disposed on both sides of the main longitudinal beam, and the two secondary longitudinal beams are disposed between the two irregularly shaped outer edge longitudinal beams. Both ends of the two irregularly shaped outer edge longitudinal beams are integrally bent to form straight sections, and both ends of the two secondary longitudinal beams are fixedly connected to the two straight sections of the irregularly shaped outer edge longitudinal beams on the same side. This invention can improve the ease of frame assembly, enhance the load-bearing capacity of the outer edge of the frame and the overall structural stability, reduce the frame weight, and also assist in battery unit heat dissipation to reduce energy consumption, facilitate the testing of frame weld airtightness, and check structural stability.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle frame technology, and in particular relates to a combined longitudinal beam type integrated aluminum alloy frame. Background Technology

[0002] With the development of the automotive industry, lightweight and high-performance chassis have become key pursuits. The rise of new energy vehicles has posed new challenges to the load-bearing capacity and weight control of chassis. Through good structural design, the safety of new energy vehicles can be improved.

[0003] Currently, automobile frames are generally assembled from several longitudinal beams and crossbeams through riveting, welding, and other processes to ensure sufficient connection strength. However, with the rapid development of new energy vehicles, which are powered by electricity, accelerate quickly, and drive flexibly, higher requirements are placed on the weight and structural strength of the frame. The combined longitudinal beam integrated aluminum alloy frame disclosed in patent announcement number CN113212553B is a product that conforms to this trend. Traditional frames mostly use the longitudinal beam in the middle as the main load-bearing structure, and install crossbeams from the side wall of the longitudinal beam and extend to the outer edge of the frame. This results in the need to install additional beam structures at the ends of the outermost crossbeams. This not only greatly increases the complexity of assembly, but also makes the load-bearing capacity at the outer edge of the frame poor, making it difficult to meet the increasingly stringent performance requirements of new energy vehicles for the frame. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a combined longitudinal beam type integrated aluminum alloy frame.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a combined longitudinal beam integrated aluminum alloy frame, comprising a main longitudinal beam and two secondary longitudinal beams disposed on both sides of the main longitudinal beam, and further comprising:

[0006] Two irregularly shaped outer edge longitudinal beams are arranged on both sides of the main longitudinal beam, and two secondary longitudinal beams are arranged between the two irregularly shaped outer edge longitudinal beams. Both ends of the two irregularly shaped outer edge longitudinal beams are integrally bent to form straight sections, and both ends of the two secondary longitudinal beams are fixedly connected to the two straight sections of the irregularly shaped outer edge longitudinal beams on the same side.

[0007] Connecting components are installed at both ends of the main longitudinal beam, and the main longitudinal beam is connected to two irregularly shaped outer edge longitudinal beams through the connecting components;

[0008] Multiple crossbeams are arranged between the two irregularly shaped outer longitudinal beams, and each crossbeam is fixedly inserted into the side wall of the main longitudinal beam and the secondary longitudinal beam.

[0009] The battery compartment bottom cover is installed at the top center of the main longitudinal beam, and the tops of the two secondary longitudinal beams and the irregular outer edge longitudinal beam are fixedly connected to the bottom of the battery compartment bottom cover. The battery compartment bottom cover is equipped with a heat dissipation unit.

[0010] Preferably, the connecting assembly includes U-shaped slots at both ends of the main longitudinal beam, both ends of the irregular outer edge longitudinal beam are integrally bent to form insertion parts, and the two insertion parts of the two irregular outer edge longitudinal beams on the same side press against each other, the two insertion parts on the same side are engaged in the U-shaped slots on the same side, and the two insertion parts on the same side are welded and fixed to the main longitudinal beam.

[0011] Preferably, the heat dissipation unit includes multiple boxes fixedly installed on the bottom cover of the battery compartment, and each box is respectively arranged between two crossbeams on the same side. Each box has an air supply groove on both sides of its end face. Each box has an air supply component inside. The bottom cover of the battery compartment has multiple horizontal cavities inside, and each horizontal cavity has an air inlet hole on its lower cavity wall. Each air inlet hole is connected to the corresponding air supply groove. The cavity walls of two adjacent horizontal cavities have multiple connecting holes. The side wall of the bottom cover of the battery compartment is fixedly connected to two air outlet pipes, and the horizontal cavity on the same side as the air outlet pipes has two exhaust holes connected to the air outlet pipes.

[0012] Preferably, the air supply assembly includes a push block disposed inside the box body. Sliding blocks are installed at both the upper and lower ends of the push block, and the push block is slidably disposed inside the box body via the sliding blocks. Squeezing plates are slidably connected to both sides of the push block inside the box body. Springs are disposed between the two squeezing plates and the inner wall of the box body. An elastic airbag sleeve is fitted over the outer side of each spring and is fixedly disposed between the squeezing plate and the inner wall of the box body. A one-way air outlet is opened on the side wall of the box body inside the elastic airbag sleeve, and the one-way air outlet communicates with the air supply groove. A one-way air replenishment hole is opened on the side wall of the box body inside the elastic airbag sleeve, and a one-way valve is installed inside both the one-way air replenishment hole and the one-way air outlet.

[0013] Preferably, both of the two secondary longitudinal beams have exhaust vents at their tail ends, and both exhaust pipes are connected to the interior of the exhaust vents on the same side.

[0014] Preferably, each of the crossbeams has an internal ventilation hole, and the sidewall of each ventilation hole has a circular hole that communicates with the exhaust port. The two secondary longitudinal beams are each provided with an inflation pipe on the side of the exhaust port slot, and the two inflation pipes are fixedly inserted into the straight sidewall of the same side irregular outer edge longitudinal beam. The two inflation pipes are connected to the same side exhaust port, and the walls of the two inflation pipes are fixedly inserted with a pressure detection pipe.

[0015] Preferably, the sidewalls of the two irregularly shaped outer longitudinal beams include a rear wheel section and a front wheel section. The sidewalls of the two rear wheel sections are fixedly connected to the sidewalls of the secondary longitudinal beams on the same side, and the sidewalls of the two front wheel sections are fixedly connected to the sidewalls of the secondary longitudinal beams on the same side by connecting columns.

[0016] Preferably, both ends of the sidewall of the main longitudinal beam are fitted with fixing pins, and the fixing pins pass through the sidewalls of the two fittings on the same side.

[0017] Compared with existing technologies, the advantages of a combined longitudinal beam integrated aluminum alloy frame are:

[0018] 1. Through the cooperation of the main longitudinal beam, two secondary longitudinal beams, two irregularly shaped outer longitudinal beams, straight sections, connecting components, and multiple crossbeams, the irregularly shaped outer longitudinal beams, which are integrally bent, can eliminate the need for additional beam structures at the outer edge of the frame. This not only improves the ease of frame assembly, but also, through the integrated structure, in conjunction with the main longitudinal beams, secondary longitudinal beams, and crossbeams, greatly enhances the load-bearing capacity at the outer edge of the frame and improves the overall stability of the frame structure. At the same time, it can reduce the weight of the frame to a certain extent.

[0019] 2. The battery compartment bottom cover can be used to support and install the battery units of new energy vehicles, while the heat dissipation unit can use the airflow generated when the vehicle is running to help the battery units dissipate heat quickly, thereby reducing energy consumption to a certain extent.

[0020] 3. The coordinated arrangement of exhaust vents, ventilation holes, round holes, air inlets, and air pressure detection pipes facilitates airtightness testing of the welding positions of the sub-longitudinal beams and crossbeams. This allows personnel to easily inspect welding defects in the frame and also facilitates regular inspections of the frame's structural stability. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a combined longitudinal beam integrated aluminum alloy frame provided by the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure between the main longitudinal beam, the secondary longitudinal beam, and the irregularly shaped outer edge longitudinal beam of a combined longitudinal beam integrated aluminum alloy frame provided by the present invention.

[0023] Figure 3 This invention provides a combined longitudinal beam type integrated aluminum alloy frame. Figure 2 Enlarged view of the structure of section A;

[0024] Figure 4 This is a three-dimensional structural diagram of the battery compartment bottom cover of a combined longitudinal beam integrated aluminum alloy vehicle frame provided by the present invention.

[0025] Figure 5 This is a schematic diagram of the internal structure of the housing of a combined longitudinal beam integrated aluminum alloy vehicle frame provided by the present invention;

[0026] Figure 6This is a cross-sectional structural schematic diagram of the battery compartment bottom cover of a combined longitudinal beam integrated aluminum alloy vehicle frame provided by the present invention.

[0027] Figure 7 This is a schematic diagram of the connection structure between the sub-longitudinal beam and the crossbeam of a combined longitudinal beam integrated aluminum alloy frame provided by the present invention.

[0028] Figure 8 This invention provides a combined longitudinal beam type integrated aluminum alloy frame. Figure 7 Enlarged view of the structure of section B;

[0029] Figure 9 This is a cross-sectional structural diagram of the connection between the sub-longitudinal beam and the crossbeam of a combined longitudinal beam integrated aluminum alloy frame provided by the present invention.

[0030] In the diagram: 1. Main longitudinal beam, 2. Secondary longitudinal beam, 3. Irregular outer edge longitudinal beam, 4. Straight section, 5. Connecting assembly, 51. U-shaped slot, 52. Insertion section, 6. Crossbeam, 7. Battery compartment bottom cover, 8. Heat dissipation unit, 81. Box body, 82. Air supply slot, 83. Horizontal cavity, 84. Air inlet, 85. Connecting hole, 86. Air outlet pipe, 87. Exhaust hole, 9. Air supply assembly, 91. Push block, 92. Sliding block, 93. Extrusion plate, 94. Spring, 95. Elastic airbag sleeve, 96. One-way air outlet, 97. One-way air replenishment hole, 98. One-way valve, 10. Exhaust port, 11. Vent hole, 12. Round hole, 13. Inflation pipe, 14. Air pressure detection pipe, 15. Rear wheel section, 16. Front wheel section, 17. Connecting column, 18. Fixing pin. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] like Figures 1-9As shown, a combined longitudinal beam type integrated aluminum alloy frame includes a main longitudinal beam 1 and two secondary longitudinal beams 2 disposed on both sides of the main longitudinal beam 1. It also includes two irregularly shaped outer edge longitudinal beams 3, which are disposed on both sides of the main longitudinal beam 1, and the two secondary longitudinal beams 2 are disposed between the two irregularly shaped outer edge longitudinal beams 3. Both ends of the two irregularly shaped outer edge longitudinal beams 3 are integrally bent to form straight portions 4. Both ends of the two secondary longitudinal beams 2 are fixedly connected to the two straight portions 4 of the irregularly shaped outer edge longitudinal beams 3 on the same side. Connecting components 5 are disposed at both ends of the main longitudinal beam 1. The beam 1 is connected to two irregularly shaped outer longitudinal beams 3 via a connecting component 5. The connecting component 5 includes U-shaped slots 51 at both ends of the main longitudinal beam 1. Both ends of the irregularly shaped outer longitudinal beams 3 are integrally bent to form insertion parts 52. The two insertion parts 52 on the same side of the two irregularly shaped outer longitudinal beams 3 press against each other. The two insertion parts 52 on the same side are both engaged inside the U-shaped slots 51 on the same side. The two insertion parts 52 on the same side are welded and fixed to the main longitudinal beam 1. The bending transition of the irregularly shaped outer longitudinal beams 3 is rounded, and the wall thickness is increased at the rounded corner to ensure the structural strength at the bending point.

[0033] Multiple crossbeams 6 are arranged between two irregularly shaped outer longitudinal beams 3, and each crossbeam 6 is fixedly inserted into the side wall of the main longitudinal beam 1 and the secondary longitudinal beam 2. The battery compartment bottom cover 7 is installed at the top middle position of the main longitudinal beam 1, and the tops of the two secondary longitudinal beams 2 and the irregularly shaped outer longitudinal beams 3 are fixedly connected to the bottom of the battery compartment bottom cover 7. The battery compartment bottom cover 7 is equipped with a heat dissipation unit 8, which includes multiple boxes 81 fixedly installed on the battery compartment bottom cover 7, and each box 81 is respectively arranged between two crossbeams 6 on the same side. The end faces of each box 81 are... Each side is provided with an air supply slot 82, and each box 81 is provided with an air supply component 9. The battery compartment bottom cover 7 is provided with multiple transverse cavities 83, and each transverse cavity 83 has an air inlet 84 on its lower cavity wall. Each air inlet 84 is connected to the corresponding air supply slot 82. The cavity walls of two adjacent transverse cavities 83 are provided with multiple connecting holes 85. Two air outlet pipes 86 are fixedly connected to the side wall of the battery compartment bottom cover 7, and the transverse cavity 83 on the same side as the air outlet pipes 86 has two exhaust holes 87 that are connected to the air outlet pipes 86.

[0034] The air supply assembly 9 includes a push block 91 disposed inside the housing 81. Sliding blocks 92 are installed at both the upper and lower ends of the push block 91, and the push block 91 is slidably disposed inside the housing 81 via the sliding blocks 92. Squeezing plates 93 are slidably connected to both sides of the push block 91 inside the housing 81. Springs 94 are disposed between the two squeezing plates 93 and the inner wall of the housing 81. Elastic airbag sleeves 95 are fitted over the outer sides of the springs 94, and the elastic airbag sleeves 95 are fixedly disposed on the squeezing plates 93. Between the pressure plate 93 and the inner wall of the box body 81, a one-way air outlet 96 is provided on the side wall of the box body 81 located inside the elastic airbag sleeve 95, and the one-way air outlet 96 is connected to the air supply groove 82. A one-way air replenishment hole 97 is provided on the side wall of the box body 81 located inside the elastic airbag sleeve 95. A one-way valve 98 is installed inside both the one-way air replenishment hole 97 and the one-way air outlet 96. Rubber pads are provided on both side walls of the push block 91 to prevent noise from being generated during squeezing and impact.

[0035] Both of the two secondary longitudinal beams 2 have exhaust vents 10 at their tail ends, and both exhaust pipes 86 are connected to the interior of the exhaust vents 10 on the same side. The exhaust vents 10 can facilitate the discharge of heat dissipation airflow.

[0036] Each crossbeam 6 has an internal ventilation hole 11, and each ventilation hole 11 has a circular hole 12 connected to the exhaust port 10 on its side wall. The two secondary longitudinal beams 2 are each provided with an inflation pipe 13 on one side of the slot of the exhaust port 10. The two inflation pipes 13 are fixedly inserted into the side wall of the straight part 4 of the irregular outer edge longitudinal beam 3 on the same side. The two inflation pipes 13 are connected to the exhaust port 10 on the same side. The walls of the two inflation pipes 13 are fixedly inserted with a pressure detection pipe 14. The pressure detection pipe 14 can be equipped with a detector for detecting pressure. The inner walls of the exhaust port 10, ventilation hole 11, and circular hole 12 are coated with a noise reduction coating and a rust prevention coating.

[0037] The sidewalls of the two irregularly shaped outer longitudinal beams 3 include a rear wheel section 15 and a front wheel section 16. The sidewalls of the two rear wheel sections 15 are fixedly connected to the sidewalls of the secondary longitudinal beams 2 on the same side. The sidewalls of the two front wheel sections 16 are fixedly connected to the sidewalls of the secondary longitudinal beams 2 on the same side. The connection between the rear wheel section 15 and the secondary longitudinal beam 2 is achieved by full-circumferential welding. The connecting column 17 can improve the connection strength between the front wheel section 16 and the secondary longitudinal beam 2.

[0038] Both ends of the side wall of the main longitudinal beam 1 are fitted with fixing pins 18, and the fixing pins 18 pass through the side walls of the two insertion parts 52 on the same side. The fixing pins 18 can improve the connection stability between the main longitudinal beam 1 and the insertion parts 52.

[0039] The operating principle of this invention is explained as follows: During frame assembly, two secondary longitudinal beams 2 are installed on both sides of the main longitudinal beam 1 using a mold frame. Then, each crossbeam 6 is sequentially inserted through the secondary longitudinal beams 2 and the main longitudinal beam 1. The positional accuracy of the crossbeams 6, the main longitudinal beam 1, and the secondary longitudinal beams 2 is determined using the mold frame. Then, two irregularly shaped outer edge longitudinal beams 3 are fitted onto the outer sides of each crossbeam 6 in a top-to-bottom direction to form the outer edge of the frame. Two insertion parts 52 are inserted into the U-shaped slots 51. Subsequently, the insertion parts 52 are fixed to the main longitudinal beam 1 using fixing pins 18. Finally, the crossbeams are welded together. The connection points of beam 6 with main longitudinal beam 1 and secondary longitudinal beam 2, the connection points of secondary longitudinal beam 2 with irregular outer edge longitudinal beam 3, and the connection points of main longitudinal beam 1 with two plug-in parts 52 are welded and fixed. Among them, the connection points of the ends of the two secondary longitudinal beams 2 with the side walls of irregular outer edge longitudinal beam 3 also need to be reinforced by bolts and other structures. Finally, the battery compartment bottom cover 7 is welded and fixed to the middle position of the end face of the vehicle frame, so that each box 81 is positioned between adjacent cross beams 6. (The battery compartment bottom cover 7 is used to support the battery unit of the new energy vehicle, and a fixing frame and other structures for fixing the battery unit can be installed on it.)

[0040] When a vehicle using this frame is in motion, the inertia generated by braking and acceleration causes the push block 91 to move to one side of the housing 81. This movement pushes the compression plate 93 on one side, causing it to move under pressure. This compression compresses the air inside the elastic airbag sleeve 95 on the same side. Under the action of the one-way valve 98, the air inside the elastic airbag sleeve 95 is discharged into the air supply slot 82 through the one-way vent 96. After the inertia dissipates, the compression plate 93, under the action of the spring 94, moves the elastic airbag sleeve 95 back to its original position. Under the pressure difference, external air is replenished into the elastic airbag sleeve 95 through the one-way air inlet 97, while the air entering the air supply slot 82 enters the transverse cavity 83 on the same side through the air inlet 84, and is finally discharged through the air outlet 86 via the connecting hole 85 and the exhaust hole 87. Because the airflow inside the battery compartment bottom cover 7 accelerates heat dissipation, this process is beneficial for the battery compartment bottom cover 7. The heat is dissipated and cooled through the battery compartment bottom cover 7, which can conduct heat from the battery cells installed on it, thus indirectly assisting in the cooling of the battery cells. The air discharged through the exhaust pipe 86 enters the exhaust port 10 and is discharged through the slot of the exhaust port 10. The cooling unit 8 can use the dynamic inertial force of the vehicle during driving (such as acceleration and deceleration) to drive the airflow circulation, forming a passive cooling assistance. Through the bidirectional dynamic response mechanism of the air supply component 9, airflow disturbance is continuously generated during the vehicle's movement, and the heat from the battery compartment bottom cover 7 is discharged through the transverse cavity 83 and the exhaust pipe 86. Compared with the traditional active cooling system, no additional energy consumption is required, and the cooling efficiency can be significantly improved under complex conditions such as frequent start-stop. At the same time, the integrated design of this cooling structure with the battery compartment bottom cover 7 can serve as a supplement to the main cooling system such as liquid cooling and air cooling, forming a multi-level cooling network, effectively reducing the temperature fluctuation of the battery cells and extending the battery life.

[0041] After the frame welding is completed, connect the air supply end of an external air supply device (such as an air pump) to the inflation pipe 13, and install an external air pressure detector into the air pressure detection pipe 14. Then, inflate the inflation pipe 13 with gas through the external air supply device. The gas will enter the various vents 11 through the inflation pipe 13, the exhaust port 10, and the round hole 12. When the air pressure in the inflation pipe 13 is detected by the air pressure detection pipe 14 to rise to 1.5 atmospheres, shut off the external air supply device, and seal the air supply end of the air supply device using valves or other structures. Then wait 10 minutes and check the air pressure displayed on the air pressure detector. If the weld is lowered, it can be determined whether there are welding defects at each welding position of the crossbeam 6 and the secondary longitudinal beam 2. During subsequent vehicle maintenance, this method can also be used to detect whether there are cracks or other phenomena at the welds of the frame, so as to ensure the structural stability of the frame and to detect defects that affect the stability of the frame in a timely manner. (Among them, the diameter of the exhaust port 10 and the ventilation port 11 is 0.8 mm, the diameter of the round hole 12 is 1.2 mm, and the main longitudinal beam 1 also has a hole with a diameter of 0.8 mm inside, and this hole is also connected to the ventilation port 11 of the crossbeam 6 to ensure the comprehensiveness of the inspection of each weld. The frame material is selected as 6061 aluminum alloy.)

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite longitudinal beam integrated aluminum alloy frame, comprising a main longitudinal beam (1) and two secondary longitudinal beams (2) disposed on both sides of the main longitudinal beam (1), characterized in that, Also includes: Two irregularly shaped outer edge longitudinal beams (3) are set on both sides of the main longitudinal beam (1), and two secondary longitudinal beams (2) are set between the two irregularly shaped outer edge longitudinal beams (3). The two ends of the two irregularly shaped outer edge longitudinal beams (3) are bent integrally to form straight parts (4), and the two ends of the two secondary longitudinal beams (2) are fixedly connected to the two straight parts (4) of the irregularly shaped outer edge longitudinal beams (3) on the same side. The connecting component (5) is set at both ends of the main longitudinal beam (1), and the main longitudinal beam (1) is connected to two irregular outer edge longitudinal beams (3) through the connecting component (5); Multiple crossbeams (6) are set between the two irregular outer edge longitudinal beams (3), and each crossbeam (6) is fixedly inserted into the side wall of the main longitudinal beam (1) and the secondary longitudinal beam (2); The battery compartment bottom cover (7) is installed at the top middle position of the main longitudinal beam (1), and the tops of the two secondary longitudinal beams (2) and the irregular outer edge longitudinal beam (3) are fixedly connected to the bottom of the battery compartment bottom cover (7). The battery compartment bottom cover (7) is equipped with a heat dissipation unit (8). The connecting component (5) includes U-shaped slots (51) at both ends of the main longitudinal beam (1). Both ends of the irregular outer edge longitudinal beam (3) are integrally bent to form insertion parts (52). The two insertion parts (52) of the two irregular outer edge longitudinal beams (3) located on the same side press against each other. The two insertion parts (52) on the same side are both inserted into the U-shaped slots (51) on the same side. The two insertion parts (52) on the same side are welded and fixed to the main longitudinal beam (1). The heat dissipation unit (8) includes multiple boxes (81) fixedly installed on the bottom cover (7) of the battery compartment, and each box (81) is respectively arranged between two crossbeams (6) on the same side. Each box (81) has an air supply groove (82) on both sides of its end face. Each box (81) has an air supply component (9) inside. The bottom cover (7) of the battery compartment has multiple horizontal cavities (83) inside. Each horizontal cavity (83) has an air inlet hole (84) on its lower cavity wall. Each air inlet hole (84) is connected to the corresponding air supply groove (82). The cavity walls of two adjacent horizontal cavities (83) have multiple connecting holes (85). The side wall of the bottom cover (7) of the battery compartment is fixedly connected to two air outlet pipes (86). The horizontal cavity (83) on the same side as the air outlet pipes (86) has two exhaust holes (87) connected to the air outlet pipes (86).

2. The integrated aluminum alloy frame with combined longitudinal beams according to claim 1, characterized in that, The gas supply assembly (9) includes a push block (91) disposed inside the housing (81). Sliding blocks (92) are installed at both the upper and lower ends of the push block (91), and the push block (91) is slidably disposed inside the housing (81) via the sliding blocks (92). Squeezing plates (93) are slidably connected to both sides of the push block (91) inside the housing (81). Springs (94) are disposed between the two squeezing plates (93) and the inner wall of the housing (81). An elastic gas spring is sleeved on the outer side of each spring (94). The airbag sleeve (95) is fixedly disposed between the compression plate (93) and the inner wall of the box body (81). The side wall of the box body (81) is provided with a one-way air outlet (96) located inside the elastic airbag sleeve (95), and the one-way air outlet (96) is connected to the air supply groove (82). The side wall of the box body (81) is provided with a one-way air replenishment hole (97) located inside the elastic airbag sleeve (95), and a one-way valve (98) is installed inside both the one-way air replenishment hole (97) and the one-way air outlet hole (96).

3. The integrated aluminum alloy frame with combined longitudinal beams according to claim 1, characterized in that, Both of the two secondary longitudinal beams (2) have exhaust ports (10) at their tail ends, and both exhaust pipes (86) are connected to the interior of the exhaust ports (10) on the same side.

4. The integrated aluminum alloy frame with combined longitudinal beams according to claim 3, characterized in that, Each of the crossbeams (6) has an internal ventilation hole (11), and each ventilation hole (11) has a circular hole (12) connected to the exhaust hole (10) on its sidewall. The two secondary longitudinal beams (2) are provided with an inflation pipe (13) on one side of the slot of the exhaust hole (10), and the two inflation pipes (13) are fixedly inserted into the sidewall of the straight part (4) of the same side irregular outer edge longitudinal beam (3). The two inflation pipes (13) are connected to the same side exhaust hole (10), and the walls of the two inflation pipes (13) are fixedly inserted with a pressure detection pipe (14).

5. The integrated aluminum alloy frame with combined longitudinal beams according to claim 1, characterized in that, The sidewalls of the two irregular outer edge longitudinal beams (3) include a rear wheel section (15) and a front wheel section (16). The sidewalls of the two rear wheel sections (15) are fixedly connected to the sidewalls of the same side auxiliary longitudinal beam (2). The sidewalls of the two front wheel sections (16) are fixedly connected to the sidewalls of the same side auxiliary longitudinal beam (2) by connecting columns (17).

6. The integrated aluminum alloy frame with combined longitudinal beams according to claim 1, characterized in that, The main longitudinal beam (1) has fixing pins (18) inserted at both ends of its side wall, and the fixing pins (18) pass through the side walls of the two insertion parts (52) on the same side.

Images