An integrated chassis system installation device for electric trucks

Abstract

The present invention discloses an installation device for an integrated chassis system of an electric truck, comprising a main frame installed in a frame assembly frame; the main frame is provided with an all-in-one controller assembly installation bracket, a battery installation bracket, a low-voltage junction box installation bracket, a brake installation bracket, a first thermal management installation bracket group, and a second thermal management installation bracket group; after the chassis accessories are installed on the main frame in sequence, the main frame is assembled with the frame assembly. The main frame of the present invention is connected to the frame assembly through a frame crossbeam connecting bracket and a frame longitudinal beam connecting bracket as a load-bearing body, and a layered assembly is adopted, the battery installation bracket is installed on the upper layer of the main frame, and the thermal management installation bracket group and the brake installation bracket group are installed on the lower layer, and the thermal management installation bracket group and the brake installation bracket group are connected to the main frame through a connecting vertical beam group.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy trucks, and in particular relates to an installation device for an integrated chassis system of an electric truck. Background Art

[0002] Nowadays, energy crisis and environmental protection are attracting more and more attention from all countries. Therefore, new energy vehicles are also valued by various automobile companies. New energy chassis accessories (mainly including: high and low voltage controller assembly, all-in-one controller assembly, battery, etc.) are important components of the vehicle. Its mounting bracket is mainly connected to the vehicle frame through bolts, and is mainly used to provide the vehicle with electrical energy, gas energy and control strategies.

[0003] The Chinese patent "A pure electric truck chassis with a through-longitudinal beam frame", publication number CN111791954A, publication date 2020.10.20, discloses a pure electric truck chassis with a through-longitudinal beam frame, including: a chassis frame, which includes a left longitudinal beam and a right longitudinal beam that are parallel to each other and spaced apart, a plurality of cross beams connected between the left longitudinal beam and the right longitudinal beam, and a front axle and a rear axle connected to the bottom of the left longitudinal beam and the right longitudinal beam; a battery bracket, which includes a front bracket fixed between the left longitudinal beam and the right longitudinal beam and located above the front axle, a middle bracket fixed between the left longitudinal beam and the right longitudinal beam and located between the front axle and the rear axle, and a side bracket fixed on the outside of the left longitudinal beam and the right longitudinal beam; a power battery pack, which includes a front power battery fixed in the front bracket and a middle power battery fixed in the middle bracket.

[0004] The Chinese patent "A heavy-load electric vehicle chassis", announcement number CN202130495U, announcement date 2012.02.01, discloses a heavy-load electric vehicle chassis, including a frame, the frame is composed of a left single-piece longitudinal beam, a right single-piece longitudinal beam and a cross beam, the left single-piece longitudinal beam and the right single-piece longitudinal beam are connected by a cross beam; the left single-piece longitudinal beam includes a left upper longitudinal beam and a left lower longitudinal beam, the left upper longitudinal beam and the left lower longitudinal beam are connected by a left vertical beam and a left oblique beam, and part of the left vertical beam and the left oblique beam form a triangle with the left upper longitudinal beam or the left lower longitudinal beam; the right single-piece longitudinal beam includes a right upper longitudinal beam and a right lower longitudinal beam, the right upper longitudinal beam and the right lower longitudinal beam are connected by a right vertical beam and a right oblique beam, and part of the right vertical beam and the right oblique beam form a triangle with the right upper longitudinal beam or the right lower longitudinal beam; the cross beam includes a front cross beam, a middle cross beam and a rear cross beam; a spring plate is provided below the left single-piece longitudinal beam and the right single-piece longitudinal beam, and tires are provided on the outer sides of the left single-piece longitudinal beam and the right single-piece longitudinal beam.

[0005] In summary, the chassis accessory brackets under the cab can be divided into two categories: (1) Layered type: divided by the upper wing surface of the frame, the upper end is a frame assembly, which is mainly used to install high and low voltage junction box assemblies, steering oil tanks, etc. The lower end bracket uses the ventral surface of the frame as the bracket foundation and is mainly used to install batteries, steering pumps, air conditioning compressors and other components. This type of overall structure is simple, and the upper and lower brackets are independent. When installing, the lower bracket must be installed and then the upper bracket must be installed. When disassembling, it is the opposite; (2) Independent type: Most chassis accessories are installed on the frame in the form of independent brackets. This structure has good independence, little interference with other accessories, and flexible disassembly and assembly. However, it has the disadvantages of many types of installed parts, complex installation, and overall weight. Summary of the invention

[0006] In view of the problems existing in the background technology, the purpose of the present invention is to provide an electric truck integrated chassis system installation device with high assembly efficiency, high integration, reduced vehicle weight and convenient maintenance.

[0007] To achieve the above-mentioned purpose, the electric truck integrated chassis system installation device designed by the present invention includes a main frame installed in the frame of the frame assembly; an all-in-one controller assembly mounting bracket for mounting the all-in-one controller assembly is welded on the main frame; a battery mounting bracket for mounting the battery assembly is provided on the main frame, and the battery mounting bracket is located behind the all-in-one controller assembly mounting bracket; the high-voltage assembly junction box assembly is installed on the main frame and is located behind the battery mounting bracket; the low-voltage junction box assembly is installed on the side wall of the battery mounting bracket and is above the high-voltage assembly junction box assembly through the low-voltage junction box mounting bracket; the air compressor is hoisted under the main frame through the brake mounting bracket group; the PTC heater, the PTC circulating water pump, and the electric steering pump are hoisted under the main frame through the first thermal management mounting bracket group located behind the brake mounting bracket group; the air conditioning compressor and the cooling circulating water pump are hoisted under the main frame through the second thermal management mounting bracket group located behind the first thermal management mounting bracket group; the chassis accessories are installed on the main frame in sequence, and then the main frame and the frame assembly are assembled.

[0008] As a preferred solution, the main frame is connected to the longitudinal beam of the frame assembly via a frame longitudinal beam connecting bracket.

[0009] Preferably, the main frame includes parallel main frame longitudinal beams, and a plurality of main frame cross beams are arranged between the main frame longitudinal beams; the main frame longitudinal beams and the main frame cross beams form a rectangular frame; the main frame longitudinal beams are connected to the longitudinal beams of the frame assembly through a frame longitudinal beam connecting bracket; the all-in-one controller assembly mounting bracket is provided with an all-in-one controller mounting hole; the battery mounting bracket is connected to the main frame through the battery mounting holes arranged on two adjacent main frame cross beams.

[0010] Further preferably, a hanging bracket is welded to the main frame.

[0011] Further preferably, the main frame crossbeam is connected to the crossbeam of the frame assembly via a frame crossbeam connecting bracket.

[0012] Preferably, the battery mounting bracket includes a group of connecting side panels, which are fixed by at least one battery frame for installing a battery assembly; a bottom flange is provided at the bottom of the connecting side panel; the battery mounting bracket is connected to the main frame through the side panel mounting holes provided on the bottom flange; one of the connecting side panels is provided with a low-voltage bracket hole for installing a low-voltage junction box mounting bracket.

[0013] Further preferably, each of the battery frames is provided with a set of J-bolts and pressure strips for fixing the battery assembly.

[0014] Further preferably, the side edge of the connecting side plate is provided with a side flange, and the side flange is provided with a low-voltage reinforcement bracket hole for installing a low-voltage junction box mounting bracket.

[0015] Still further preferably, the low-voltage junction box mounting bracket comprises a low-voltage bracket connected to the connecting side plate, and a low-voltage reinforcement bracket; one end of the low-voltage reinforcement bracket is connected to the side flange, and the other end is connected to the low-voltage bracket.

[0016] More preferably, the low-pressure reinforcement bracket is L-shaped.

[0017] Preferably, the brake mounting bracket group includes two brake longitudinal beams and two brake cross beams welded into a rectangular frame; the brake longitudinal beams and the brake cross beams are provided with air compressor mounting holes for installing an air compressor; the brake longitudinal beams are provided with brake vertical beam connecting holes for hoisting with the main frame.

[0018] Further preferably, a brake connecting beam parallel to the brake longitudinal beam is provided between the two brake cross beams.

[0019] Preferably, the first thermal management mounting bracket group includes two first thermal management longitudinal beams arranged in parallel; an electric steering pump bracket for installing an electric steering pump and a PTC bracket for installing a PTC heater and a PTC circulating water pump are provided between the first thermal management longitudinal beams; one end of the electric steering pump bracket is welded to one of the first thermal management longitudinal beams, the other end of the electric steering pump bracket is bolted to one end of the PTC bracket, and the other end of the PTC bracket is welded to another first thermal management longitudinal beam; the first thermal management longitudinal beam is provided with a first thermal management vertical beam connecting hole for hoisting with the main frame.

[0020] Further preferably, a circulating pump nut for mounting the PTC circulating pump bracket is welded to the upper end of the PTC bracket; and the PTC circulating water pump is hoisted below the PTC circulating pump bracket.

[0021] Further preferably, a PTC sub-bracket is welded to the outer side of the first thermal management longitudinal beam welded to the PTC bracket; and a PTC heater mounting hole for mounting the PTC heater is provided on the PTC bracket and the PTC sub-bracket.

[0022] Preferably, the second thermal management mounting bracket group includes two second thermal management longitudinal beams and two second thermal management cross beams welded into a rectangular frame; a thermal management reinforcement beam is provided between the second thermal management cross beams; a cooling circulation pump bracket for installing a cooling circulation water pump is welded between the thermal management reinforcement beam and one of the second thermal management longitudinal beams; air-conditioning compressor mounting holes for installing an air-conditioning compressor are provided on the second thermal management longitudinal beam, the second thermal management cross beam and the thermal management reinforcement beam; and second thermal management vertical beam connecting holes for hoisting with the main frame are provided on the second thermal management longitudinal beam and the second thermal management cross beam.

[0023] The beneficial effects of the present invention are as follows: the main frame of the present invention is connected to the frame assembly through the frame crossbeam connecting bracket and the frame longitudinal beam connecting bracket as the load-bearing body, and adopts layered assembly, the battery mounting bracket is installed on the upper layer of the main frame, and the thermal management mounting bracket group and the brake mounting bracket group are installed on the lower layer, and the thermal management mounting bracket group and the brake mounting bracket group are connected to the main frame through the connecting vertical beam group. The present invention adopts an integrated chassis accessory bracket with a simple structure, each bracket system is independent of each other, and the convenience of disassembly and assembly is good. At the same time, 10 kinds of chassis parts can be integrated and installed, with a high degree of integration. At the same time, after all chassis parts are installed on the production line, they are turned and installed on the vehicle production line, reducing the installation time of workers on the vehicle production line, reducing labor tension, and alleviating problems such as small space under driving and installation difficulties.

[0024] Compared with the prior art, the present invention is outstanding in:

[0025] 1. The integrated chassis system installation device of the present invention advances the installation of various chassis accessories offline, which can solve the problem of high online assembly tension of assemblers caused by the large number of chassis accessory installation parts, numerous connecting wire harnesses, and complicated installation procedures, thereby improving assembly efficiency.

[0026] 2. The present invention adopts an integrated design, effectively utilizes the vehicle layout space, and reduces the weight and cost of the whole vehicle.

[0027] 3. The present invention adopts a layered design of upper and lower layers, and the upper and lower brackets are assembled by bolts using a connecting vertical beam group. When the chassis accessories are maintained in the later stage, the upper chassis parts can be disassembled and repaired by lifting the cab, and the lower parts can be disassembled and repaired in the trench when they are maintained. This bracket has the characteristics of easy disassembly and high maintenance convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the assembly of the mounting device of the present invention and chassis accessories;

[0029] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 3 It is a schematic diagram of the main skeleton structure of the present invention;

[0031] Figure 4 It is a schematic diagram of the structure of the battery mounting bracket of the present invention;

[0032] Figure 5 It is a schematic diagram of the brake mounting bracket assembly mechanism of the present invention;

[0033] Figure 6 is a schematic structural diagram of a first thermal management mounting bracket group of the present invention;

[0034] Figure 7 is a schematic structural diagram of a second thermal management mounting bracket group of the present invention;

[0035] Figure 8 It is a schematic diagram of the structure of the low-voltage junction box mounting bracket of the present invention;

[0036] In the figure: 100, main frame; 101, main frame longitudinal beam; 102, main frame cross beam; 103, all-in-one controller assembly mounting bracket; 104, high-voltage assembly mounting hole; 105 lifting bracket; 200, battery mounting bracket; 201, connecting side plate; 202, battery frame; 203, low-voltage bracket hole; 204; J-bolt; 205; pressure strip; 206, side flange; 207, low-voltage reinforcement bracket hole; 300, brake installation Bracket group; 301, brake longitudinal beam; 302, brake cross beam; 303, air compressor mounting hole; 304, brake vertical beam connection hole; 305, brake connecting beam; 400, first thermal management mounting bracket group; 401, first thermal management longitudinal beam; 402, first thermal management vertical beam connection hole; 403, electric steering pump bracket; 404, electric steering pump mounting hole; 405, PTC heater mounting hole; 406, PTC circulating pump bracket; 407, circulating Ring pump nut; 408, PTC bracket; 409, PTC auxiliary bracket; 500, second thermal management mounting bracket group; 501, second thermal management longitudinal beam; 502, second thermal management cross beam; 503, thermal management reinforcement beam; 504, cooling circulation pump bracket; 505, air conditioning compressor mounting hole; 506, second thermal management vertical beam connection hole; 507, cooling pump circulation pump mounting hole; 600, low voltage junction box mounting bracket; 601, low voltage bracket; 602 , low-voltage reinforcement bracket; 7. Frame assembly; 8. Frame crossbeam; 9. Connecting vertical beam; 10. Frame crossbeam connecting bracket; 11. Frame longitudinal beam connecting bracket; 12. All-in-one controller assembly; 13. High-voltage assembly junction box assembly; 14. Battery assembly; 15. Low-voltage junction box assembly; 16. Air-conditioning compressor; 17. Cooling circulation water pump; 18. PTC heater; 19. PTC circulation water pump; 20. Electric steering pump; 21. Air compressor. DETAILED DESCRIPTION

[0037] The technical solution of the present invention (including the preferred technical solution) is further described in detail below by means of the accompanying drawings and by listing some optional embodiments of the present invention. Obviously, the described embodiments are only 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.

[0038] like Figures 1 to 8 As shown, the electric truck integrated chassis system installation device designed by the present invention includes: a main frame 100, a battery mounting bracket 200, a brake mounting bracket group 300, a first thermal management mounting bracket group 400, a second thermal management mounting bracket group 500, and a low-voltage junction box mounting bracket 600. Figure 1 , Figure 2In order to better illustrate the structural features of the present invention, one side mechanism of the frame assembly 7 is hidden.

[0039] like Figure 1 , Figure 2 and Figure 3 As shown, the main frame 100 includes main frame longitudinal beams 101 arranged in parallel, and a plurality of main frame cross beams 102 are arranged between the main frame longitudinal beams 101. Figure 3 In the figure, from left to right), a first main frame cross beam 1021, a second main frame cross beam 1022, a third main frame cross beam 1023, and a fourth main frame cross beam 1024 are provided in sequence; wherein, the main frame longitudinal beam 101 and the first main frame cross beam 1021 and the fourth main frame cross beam 1024 form a rectangular frame.

[0040] An all-in-one controller assembly mounting bracket 103 for mounting the all-in-one controller assembly 12 is welded on the main frame 101, and an all-in-one controller mounting hole 1031 is provided on the all-in-one controller assembly mounting bracket 103. In this way, the all-in-one controller assembly 12 is mounted on the all-in-one controller assembly mounting bracket 103 through bolts or screws in conjunction with the all-in-one controller mounting hole 1031, and the assembly is convenient and quick.

[0041] The battery mounting bracket 200 is connected to the main frame 100 via the battery mounting holes 1025 arranged on the second main frame cross beam 1022 and the third main frame cross beam 1023 .

[0042] The high-voltage assembly junction box assembly 13 is connected to the main frame 100 through the high-voltage assembly mounting hole 104 provided on the main frame crossbeam 102 .

[0043] The main frame longitudinal beam 101 is connected to the longitudinal beam of the frame assembly 7 through the frame longitudinal beam connecting bracket 11.

[0044] As an optional embodiment of the present invention, the main frame cross beam 102 is connected to the cross beam of the frame assembly 7 through the frame cross beam connecting bracket 10.

[0045] As an optional embodiment of the present invention, a hanging bracket 105 is welded to the main frame 100 .

[0046] like Figure 1 , Figure 2 and Figure 4As shown, the battery mounting bracket 200 includes a set of connecting side panels 201, and the connecting side panels 201 are fixed by a battery frame 202 for mounting a battery assembly; a bottom flange 2011 is provided at the bottom of the connecting side panels 201; the battery mounting bracket 200 is connected to the main frame 100 via side panel mounting holes 2012 provided on the bottom flange 2011; a low-voltage bracket hole 203 for mounting a low-voltage junction box mounting bracket 600 is provided on one of the connecting side panels 201.

[0047] In this embodiment, two battery frames 202 for fixing the battery assembly 14 are installed on the battery mounting bracket 200, and each of the battery frames 202 is provided with a set of J-bolts 204 and pressure strips 205 for fixing the battery assembly 14. One end of the J-bolt 204 is hooked on the battery frame 202, and the other end passes through the pressure strip 205 and is connected to a nut, and the battery assembly 14 is compressed by tightening the nut.

[0048] In order to further ensure the connection reliability of the low-voltage junction box assembly, in some optional embodiments of the present invention, the side of the connecting side plate 201 is provided with a side flange 206, and the side flange 206 is provided with a low-voltage reinforcement bracket hole 207 for installing the low-voltage junction box mounting bracket 600.

[0049] like Figure 1 , Figure 2 and Figure 5 As shown, the brake mounting bracket group 300 includes two brake longitudinal beams 301 and two brake cross beams 302 welded into a rectangular frame; the brake longitudinal beams 301 and the brake cross beams 302 are provided with air compressor mounting holes 303 for installing the air compressor 16; the brake longitudinal beam 301 is provided with a brake vertical beam connecting hole 304 for hoisting with the main frame 100.

[0050] As an optional embodiment of the present invention, a brake connecting beam 305 parallel to the brake longitudinal beam 301 is provided between the two brake cross beams 302 .

[0051] like Figure 1 , Figure 2 and Figure 6 As shown, the first thermal management mounting bracket group 400 includes two first thermal management longitudinal beams 401, and the side ends of the first thermal management longitudinal beams 401 are processed with first thermal management vertical beam connection holes 402 for hoisting with the main frame 100. An electric steering pump bracket 403 for mounting the electric steering pump 20 and a PTC bracket 408 for mounting the PTC heater 18 and the PTC circulating water pump 19 are arranged between the first thermal management longitudinal beams 401.

[0052] One end of the electric steering pump bracket 403 is welded to one of the first thermal management longitudinal beams 401 , the other end of the electric steering pump bracket 403 is bolted to one end of the PTC bracket 408 , and the other end of the PTC bracket 408 is welded to another first thermal management longitudinal beam 401 .

[0053] The electric steering pump bracket 403 is processed with an electric steering pump mounting hole 404 for mounting the electric steering pump 20. A circulating pump nut 407 for mounting the PTC circulating pump bracket 406 is welded to the upper end of the PTC bracket 408. The PTC circulating water pump 19 is hoisted below the PTC circulating pump bracket 406. The PTC circulating pump bracket 406 is bolted to the PTC bracket 408. The PTC circulating water pump mounting hole is processed on the PTC circulating pump bracket 406.

[0054] A PTC sub-bracket 409 is welded to the outer side of the first thermal management longitudinal beam 401 welded to the PTC bracket 408 ; a PTC heater mounting hole 405 for mounting the PTC heater 18 is provided on the PTC bracket 408 and the PTC sub-bracket 409 .

[0055] like Figure 1 , Figure 2 and Figure 7 As shown, the second thermal management mounting bracket group 500 includes two second thermal management longitudinal beams 501 and two second thermal management cross beams 502 welded into a rectangular frame; a thermal management reinforcement beam 503 is provided between the second thermal management cross beams 502; a cooling circulation pump bracket 504 for mounting a cooling circulation water pump 17 is welded between the thermal management reinforcement beam 503 and one of the second thermal management longitudinal beams 501; an air conditioning compressor mounting hole 505 for mounting an air conditioning compressor 16 is provided on the second thermal management longitudinal beam 501, the second thermal management cross beam 502 and the thermal management reinforcement beam 503. The second thermal management longitudinal beam 501 and the second thermal management cross beam 502 are provided with a second thermal management vertical beam connection hole 506 for hoisting with the main frame 100. The cooling circulation water pump 17 is connected to the cooling circulation pump bracket 504 through a cooling pump circulation pump mounting hole 507 provided on the cooling circulation pump bracket 504.

[0056] like Figure 1 , Figure 2 and Figure 8 As shown, the above-mentioned low-voltage junction box mounting bracket 600 includes a low-voltage bracket 601 connected to the connecting side plate 201, and a low-voltage reinforcement bracket 602; one end of the low-voltage reinforcement bracket 602 is connected to the side flange 206, and the other end is connected to the low-voltage bracket 601.

[0057] As an optional embodiment of the present invention, the low-pressure reinforcement bracket is L-shaped.

[0058] The frame crossbeam connecting bracket 10 and the frame longitudinal beam connecting bracket 11 constitute a frame bracket connecting group. The frame longitudinal beam connecting bracket 11 is installed on the ventral surface of the frame assembly 7, adopts a double L bracket connection method, one end is connected to the main frame 100, and the other end is connected to the frame assembly 7. In some optional embodiments of the present invention, the frame crossbeam connecting bracket 10 can also be eliminated, and the number of the frame longitudinal beam connecting bracket 11 can be increased or decreased according to the force analysis.

[0059] The brake mounting bracket group 300, the first thermal management mounting bracket group 400, and the second thermal management mounting bracket group 500 are hoisted below the main frame 100 through the connecting vertical beam 9. The connecting vertical beam 9 is processed at the side end with connecting vertical beam group holes adapted to the brake vertical beam connecting hole 304, the first thermal management vertical beam connecting hole 402, and the second thermal management vertical beam connecting hole 506, as well as the frame connecting bracket group holes adapted to the frame longitudinal beam connecting bracket 11.

[0060] The present invention sequentially installs the accessories of the main frame, the accessories of the brake mounting bracket group, the accessories of the thermal management mounting bracket group, the accessories of the low-voltage junction box mounting bracket, the accessories of the low-voltage junction box mounting bracket, and the accessories of the battery mounting bracket, and then installs various bracket assemblies with the main frame, and then assembles the main frame equipped with various chassis accessories with the frame assembly equipped with the frame connecting bracket group.

[0061] Those skilled in the art will readily appreciate that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, replacements, improvements, etc. made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. An electric truck integrated chassis system installation device, characterized in that: It includes a main frame installed in the frame of the vehicle frame assembly; an all-in-one controller assembly mounting bracket for mounting the all-in-one controller assembly is welded on the main frame; a battery mounting bracket for mounting the battery assembly is provided on the main frame, and the battery mounting bracket is located behind the all-in-one controller assembly mounting bracket; the high-voltage assembly junction box assembly is installed on the main frame and is located behind the battery mounting bracket; the low-voltage junction box assembly is installed on the side wall of the battery mounting bracket and is above the high-voltage assembly junction box assembly through the low-voltage junction box mounting bracket; the air compressor is hoisted under the main frame through the brake mounting bracket group; the PTC heater, the PTC circulating water pump, and the electric steering pump are mounted through the first thermal management unit located behind the brake mounting bracket group The mounting bracket group is hoisted under the main frame; the air-conditioning compressor and the cooling circulation water pump are hoisted under the main frame through the second thermal management mounting bracket group located behind the first thermal management mounting bracket group; the chassis accessories are installed on the main frame in sequence, and then the main frame and the frame assembly are assembled; the main frame includes parallel main frame longitudinal beams, and a plurality of main frame cross beams are arranged between the main frame longitudinal beams; the main frame longitudinal beams and the main frame cross beams form a rectangular frame; the main frame longitudinal beams are connected to the longitudinal beams of the frame assembly through the frame longitudinal beam connecting bracket; the all-in-one controller assembly mounting bracket is provided with an all-in-one controller mounting hole; the battery mounting bracket is connected to the main frame through the battery mounting holes arranged on two adjacent main frame cross beams.

2. The electric truck integrated chassis system installation device according to claim 1, characterized in that: A hanging bracket is welded on the main frame.

3. The electric truck integrated chassis system installation device according to claim 2, characterized in that: The main frame cross beam is connected to the cross beam of the frame assembly through a frame cross beam connecting bracket.

4. The electric truck integrated chassis system installation device according to claim 1, characterized in that: The battery mounting bracket includes a group of connecting side panels, and the connecting side panels are fixed by at least one battery frame for mounting a battery assembly; a bottom flange is provided at the bottom of the connecting side panel; the battery mounting bracket is connected to the main frame through a side panel mounting hole provided on the bottom flange; a low-voltage bracket hole for mounting a low-voltage junction box mounting bracket is provided on one of the connecting side panels; a side flange is provided on the side of the connecting side panel, and a low-voltage reinforcement bracket hole for mounting a low-voltage junction box mounting bracket is provided on the side flange; each of the battery frames is provided with a group of J-bolts and pressure strips for fixing the battery assembly.

5. The electric truck integrated chassis system installation device according to claim 4, characterized in that: The low-voltage junction box mounting bracket includes a low-voltage bracket connected to the connecting side plate, and a low-voltage reinforcement bracket; one end of the low-voltage reinforcement bracket is connected to the side flange, and the other end is connected to the low-voltage bracket; the low-voltage reinforcement bracket is L-shaped.

6. The electric truck integrated chassis system installation device according to claim 1, characterized in that: The brake mounting bracket group includes two brake longitudinal beams and two brake cross beams welded into a rectangular frame; the brake longitudinal beams and the brake cross beams are provided with air compressor mounting holes for installing an air compressor; the brake longitudinal beams are provided with brake vertical beam connecting holes for hoisting with the main frame; a brake connecting beam parallel to the brake longitudinal beams is provided between the two brake cross beams.

7. The electric truck integrated chassis system installation device according to claim 1, characterized in that: The first thermal management mounting bracket group includes two first thermal management longitudinal beams arranged in parallel; an electric steering pump bracket for installing an electric steering pump and a PTC bracket for installing a PTC heater and a PTC circulating water pump are provided between the first thermal management longitudinal beams; one end of the electric steering pump bracket is welded to one of the first thermal management longitudinal beams, the other end of the electric steering pump bracket is bolted to one end of the PTC bracket, and the other end of the PTC bracket is welded to another first thermal management longitudinal beam; the first thermal management longitudinal beam is provided with a first thermal management vertical beam connecting hole for hoisting with the main frame.

8. The electric truck integrated chassis system installation device according to claim 7, characterized in that: A circulating pump nut for installing the PTC circulating pump bracket is welded to the upper end of the PTC bracket; the PTC circulating water pump is hoisted under the PTC circulating pump bracket; a PTC sub-bracket is welded to the outer side of the first thermal management longitudinal beam welded to the PTC bracket; and a PTC heater mounting hole for installing the PTC heater is provided on the PTC bracket and the PTC sub-bracket.

9. The electric truck integrated chassis system installation device according to claim 1, characterized in that: The second thermal management mounting bracket group includes two second thermal management longitudinal beams and two second thermal management cross beams welded into a rectangular frame; a thermal management reinforcement beam is provided between the second thermal management cross beams; a cooling circulation pump bracket for installing a cooling circulation water pump is welded between the thermal management reinforcement beam and one of the second thermal management longitudinal beams; air-conditioning compressor mounting holes for installing an air-conditioning compressor are provided on the second thermal management longitudinal beam, the second thermal management cross beam and the thermal management reinforcement beam; second thermal management vertical beam connection holes for hoisting with the main frame are provided on the second thermal management longitudinal beam and the second thermal management cross beam.

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