An electric commercial vehicle frame and vehicle

Abstract

The present application relates to an electric commercial vehicle frame and a vehicle, belonging to the technical field of vehicles. On the one hand, the frame includes two longitudinals that are parallel and spaced apart from each other, and a battery box hoisted below the longitudinals. The longitudinal includes a front longitudinal section, a middle longitudinal section, and a rear longitudinal section that are connected in sequence. The height of the bottom of the middle longitudinal section from the horizontal plane is greater than that of the front longitudinal section and the rear longitudinal section. Multiple sets of frame cross beams on the top of the battery box are arranged at intervals along the length direction of the middle longitudinal section and are attached to the bottom of the middle longitudinal section, for forming a transverse connection between the two middle longitudinal sections. On the other hand, the vehicle includes a frame. By setting the longitudinal as a variable cross-section structure, reducing the cross-section height of the middle longitudinal section connected to the battery box, and hoisting the battery box below the middle longitudinal section, when the battery box is connected to the middle longitudinal section, the ground clearance of the battery box can be increased, solving the problem that the battery pack occupies the bottom space of the frame in the related art, and there is no need to raise the chassis or reduce the battery pack capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to an electric commercial vehicle frame and a vehicle. Background Art

[0002] The frame is an important component of an automobile. For traditional fuel vehicles, the main body of the frame consists of two longitudinal beams and several cross beams. When the wheelbase of the frame remains unchanged and the side beam type frame used in traditional fuel vehicles is adopted, in order to enable the traditional side beam type frame to meet the requirements of electric drive, the battery is usually arranged on both sides of the frame, which usually results in a large occupation of the space of the entire vehicle body. Moreover, after the battery is installed in the existing side beam type frame structure, its capacity is usually fixed and difficult to replace and adjust. And because the battery occupies the space of the frame, it increases the design difficulty of the connection between the frame and the vehicle body.

[0003] In the prior art, an electric commercial vehicle frame is provided, which includes a front frame, a middle frame and a rear frame connected in sequence. The middle frame includes a cross beam part and a longitudinal beam part. The cross beam part and the longitudinal beam part are connected by an outer angle mounting member to form a frame for accommodating a battery pack. The longitudinal beam part is provided with battery pack mounting structures, and a plurality of battery pack mounting structures are arranged in sequence along the extension direction of the longitudinal beam part. By forming a frame for accommodating the battery pack through the cross beam part and the longitudinal beam part, the battery pack can be located at the bottom of the vehicle rather than on both sides, which improves the installation space of the battery pack, reduces the occupied space of the entire frame, and through the plurality of battery pack mounting structures arranged on the longitudinal beam part, the battery pack can be mounted at multiple points, and the stress of the battery pack is evenly dispersed on the frame; on the other hand, a segmented frame is used to replace the side beam type frame and applied to electric commercial vehicles, and the frame structure is used to replace the space truss structure in the middle of the original segmented frame.

[0004] However, the problem with this solution is that since the battery pack is directly installed on the cross beam part and the longitudinal beam part of the middle frame, the battery pack occupies the bottom space of the frame. In order to ensure the passing performance of the whole vehicle, it is necessary to raise the frame and the chassis, or reduce the battery capacity. Therefore, there is a problem that the center of gravity of the frame is too high, affecting the driving stability of the whole vehicle. And this kind of frame has a large self-weight and a long wheelbase, which is not conducive to the requirement of the lightweight of the whole vehicle. Summary of the Invention

[0005] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide an electric commercial vehicle frame and a vehicle, which can solve the problems of too high center of gravity and too long wheelbase of the electric commercial vehicle frame in the prior art.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is:

[0007] On the one hand, the present application provides an electric commercial vehicle frame, including:

[0008] Two longitudinals that are parallel to each other and spaced apart. The above-mentioned longitudinals include a front section of the longitudinal, a middle section of the longitudinal, and a rear section of the longitudinal that are connected in sequence. The height of the bottom of the middle section of the longitudinal from the horizontal plane is greater than that of the front section and the rear section of the longitudinal.

[0009] A battery box, which is hoisted below the middle section of the longitudinal. Multiple sets of frame crossbeams on the top of the battery box are arranged at intervals along the length direction of the middle section of the longitudinal, and are attached to the bottom of the middle section of the longitudinal, for forming a transverse connection between the two middle sections of the longitudinal.

[0010] In some alternative embodiments, there are five sets of the above-mentioned frame crossbeams arranged at intervals. Two sets of the above-mentioned frame crossbeams located on both sides of the length direction of the middle section of the longitudinal include two sub-crossbeams, and the remaining above-mentioned frame crossbeams include one sub-crossbeam. Each of the above-mentioned sub-crossbeams is connected to the outer sidewall of the middle section of the longitudinal through a hanger.

[0011] In some alternative embodiments, a first reinforcing plate is provided on the inner sidewall of the middle section of the longitudinal, and the installation position of the first reinforcing plate corresponds to that of the hanger.

[0012] In some alternative embodiments, it further includes a front bracket for installing a front independent suspension and a rear bracket for installing a rear independent suspension. The above-mentioned front bracket is located on the front section of the longitudinal, and the above-mentioned rear bracket is located on the rear section of the longitudinal.

[0013] In some alternative embodiments, the above-mentioned front bracket includes a first sling beam and a second sling beam that are spaced and connected to the front section of the longitudinal. The two ends of the first sling beam and the second sling beam are respectively connected to the outer sidewall of the front section of the longitudinal.

[0014] In some alternative embodiments, the above-mentioned rear bracket includes two rear independent suspension balance shaft brackets. Each of the above-mentioned rear independent suspension balance shaft brackets is respectively connected to the outer sidewall of a rear section of the longitudinal, and is symmetrically arranged along the center line of the two longitudinals. A third crossbeam is provided on the inner walls of the two rear sections of the longitudinal, and the connection point of the third crossbeam with the inner sidewall of the rear section of the longitudinal corresponds to the installation position of the rear independent suspension balance shaft bracket.

[0015] In some alternative embodiments, it further includes a first crossbeam assembly. The above-mentioned first crossbeam assembly includes:

[0016] Two first crossbeam supports, which are respectively connected to the inner sidewall of the front section of the longitudinal and are located at the end of the front section of the longitudinal close to the vehicle head;

[0017] Two tow hooks, which are respectively connected to the two above-mentioned first crossbeam supports and are integrally formed with the first crossbeam supports;

[0018] A round tube beam, the two ends of which are respectively connected to the two above-mentioned first crossbeam supports.

[0019] In some alternative embodiments, it further includes a second crossbeam and a tail beam that are spaced and connected to the rear section of the longitudinal beam. Both ends of the second crossbeam are respectively connected to the connection part between the middle section and the rear section of the longitudinal beam, and the tail beam is located at the end of the rear section of the longitudinal beam close to the vehicle tail.

[0020] In some alternative embodiments, a second reinforcing plate is further provided on the inner wall of the rear section of the longitudinal beam where the third crossbeam is connected.

[0021] On the other hand, the present application also provides a vehicle, including any of the above-mentioned electric commercial vehicle frames.

[0022] The beneficial effects brought by the technical solutions provided in the embodiments of the present application include:

[0023] By setting the longitudinal beam as a variable cross-section structure, reducing the cross-sectional height of the middle section of the longitudinal beam connected to the battery box, and hoisting the battery box below the middle section of the longitudinal beam, when the battery box is connected to the middle section of the longitudinal beam, the ground clearance of the battery box can be increased, solving the problem that the battery pack occupies the space at the bottom of the vehicle frame in the related art, and there is no need to raise the chassis or reduce the battery pack capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of an electric commercial vehicle frame of the present invention;

[0026] Figure 2 For Figure 1 the top view schematic diagram;

[0027] Figure 3 For Figure 1 the schematic structural diagram of the battery box in

[0028] Figure 4 It is a schematic structural diagram of an embodiment of the battery box;

[0029] Figure 5 For Figure 1 the installation schematic diagram of the front section of the longitudinal beam and the front bracket in

[0030] In the figure: 1. Longitudinal beam; 11. Front section of the longitudinal beam; 12. Middle section of the longitudinal beam; 121. First reinforcement plate; 13. Rear section of the longitudinal beam; 2. Battery box; 21. Frame cross beam; 22. Hanger; 23. Main frame body; 24. Longitudinal connection; 3. First sling beam; 4. Second sling beam; 5. First cross beam assembly; 51. First cross beam support; 52. Tow hook; 53. Round tube beam; 6. Second cross beam; 7. Third cross beam; 71. Second reinforcement plate; 8. Tail beam; 9. Rear independent suspension balance shaft support; 101. Lower support of the front independent suspension thrust rod; 102. Upper support of the front independent suspension thrust rod. Detailed implementation manners

[0031] In order to enable those skilled in the art of this technology to better understand the solution of this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0032] The following will explain the technical solutions of this application with reference to the accompanying drawings and embodiments.

[0033] On the one hand, as Figure 1 and Figure 2 shown, the embodiment of this application provides an electric commercial vehicle frame. The frame includes two longitudinal beams 1 that are parallel to each other and arranged at intervals, and a battery box 2 hoisted below the longitudinal beam 1. The middle section 12 of the longitudinal beam used for hoisting the battery box 2 has a smaller cross-section relative to the front section 11 and the rear section 13 of the longitudinal beam, so as to provide more bottom space for the hoisting of the battery box 2 and solve the problem of affecting the vehicle passability due to the battery box 2.

[0034] Specifically, the above longitudinal beam 1 includes a front section 11, a middle section 12, and a rear section 13 of the longitudinal beam that are connected in sequence. The height of the bottom of the above middle section 12 of the longitudinal beam from the horizontal plane is greater than that of the above front section 11 and the rear section 13 of the longitudinal beam; the battery box 2 is hoisted below the above middle section 12 of the longitudinal beam. Multiple groups of frame cross beams 21 on the top of the above battery box 2 are arranged at intervals along the length direction of the above middle section 12 of the longitudinal beam and are attached to the bottom of the above middle section 12 of the longitudinal beam for forming a transverse connection between the two above middle sections 12 of the longitudinal beam.

[0035] It can be understood that since the height of the bottom of the middle section 12 of the longitudinal beam from the horizontal plane is greater than that of the front section 11 and the rear section 13 of the longitudinal beam, the longitudinal beam 1 has a three-section variable cross-section. In this example, the height of the web of the front section 11 and the rear section 13 of the longitudinal beam is 280 mm, and the height of the web of the middle section 12 of the longitudinal beam is 240 mm. Such a setting can provide sufficient bottom space for hoisting the battery box 2, enabling the battery box 2 to have more capacity to accommodate more battery packs, improving the endurance of the vehicle, and not having to raise the ground clearance of the longitudinal beam, reducing the center of gravity of the whole vehicle. At the same time, since the height of the web of the middle section 12 of the longitudinal beam is small, in order to improve the structural strength of the middle section 12 of the longitudinal beam and ensure the anti-torsion performance when the middle section 12 of the longitudinal beam is connected to the battery box 2, multiple groups of frame cross-beams 21 at the top of the battery box 2 are arranged at intervals along the length direction of the middle section 12 of the longitudinal beam, which is convenient for uniform stress distribution and forms a transverse connection between the two middle sections 12 of the longitudinal beam, increasing the beam connection between the two middle sections 12 of the longitudinal beam.

[0036] It should be noted that the battery box 2 is hoisted below the middle section 12 of the longitudinal beam and is a symmetric box body with the center line of the two longitudinal beams 1 as the axis; the volume of the battery box 2 is determined according to the requirements of the body structure design and the battery pack capacity, but the frame cross-beam 21 of the battery box 2 should be greater than or equal to the distance between the two longitudinal beams 1. The front section 11, the middle section 12, and the rear section 13 of the longitudinal beam are integrally formed by welding or casting; the connection parts between the front section 11 and the middle section 12 of the longitudinal beam and between the rear section 13 and the middle section 12 of the longitudinal beam are bent upward to form a smooth transition inclined plane to avoid stress concentration.

[0037] In some alternative embodiments, as Figure 3 shown, there are five groups of the above frame cross-beams 21 arranged at intervals. The two groups of the above frame cross-beams 21 located on both sides of the length direction of the middle section 12 of the longitudinal beam include two sub-cross-beams, and the rest of the above frame cross-beams 21 include one sub-cross-beam. Each of the above sub-cross-beams is connected to the outer side wall of the middle section 12 of the longitudinal beam through a hanger 22.

[0038] It can be understood that the sub-cross-beam is connected to the outer side wall of the middle section 12 of the longitudinal beam through the hanger 22, so that the sub-cross-beam is connected between the two longitudinal beams. The sub-cross-beam is both the frame structure of the battery box 2 and also plays a role in the transverse connection of the two middle sections 12 of the longitudinal beam. The grid-like connection structure is beneficial to improving the structural strength. The detachable connection between the hanger 22 and the outer side wall of the middle section 12 of the longitudinal beam is convenient for the installation of the battery box 2 and the middle section of the longitudinal beam, improving the versatility of the vehicle frame. The two outermost groups of frame cross-beams 21 are provided with two sub-cross-beams to improve the structural strength and anti-torsion performance at the variable cross-section.

[0039] Preferably, the hanger 22 and the middle section 12 of the longitudinal beam are connected by bolts and gaskets.

[0040] Since the weight of the battery pack and the battery frame 2 is over 7 tons, the connection through multiple sub-crossbeams is also beneficial to dispersing the tensile and torsional effects of the battery on the vehicle frame. Different from taking the battery frame 2 as a part of the vehicle frame, the solution of the embodiment of the present application is convenient for installation and maintenance and easy to disassemble. The inside of the battery frame can be set as an arched bracket, which is beneficial to improving the stiffness of the battery frame 2. The connection form of the battery frame 2 and the vehicle frame through the hanging bracket 22 can also improve the strength and stiffness of the vehicle frame.

[0041] In some alternative embodiments, the battery frame 2 further includes a main frame body 23, which is connected below multiple groups of frame crossbeams 21 and is used for placing the battery pack. The specific structure of the main frame body 23 is not limited herein. Those skilled in the art can set the main frame body as any structure according to the structure and installation requirements of the battery pack. The battery pack can be installed with the main frame body by means of sliding connection or snap connection, etc.

[0042] Preferably, as Figure 4 shown, the battery frame 2 further includes a longitudinal connection 24, which is arranged along the length direction of the middle section 12 of the longitudinal beam and is connected to the frame crossbeam 21 and the middle section 12 of the longitudinal beam. In this example, the longitudinal connection 24 is a shell arranged above the frame crossbeam 21. The top of the shell is nearly horizontal with the top of the middle section 12 of the longitudinal beam and forms a rectangular frame structure with the main frame body 23 below the frame crossbeam 21. The purpose of such setting is not only to further utilize the space on the left and right sides, below and in the middle of the middle section 12 of the longitudinal beam, providing a new layout method, but also to cancel the battery layout in the middle of the middle section 12 of the longitudinal beam and add crossbeams in case of harsh working conditions, further strengthening the strength and stiffness space of the vehicle frame and improving the versatility and adaptability of the vehicle frame.

[0043] In some alternative embodiments, a first reinforcing plate 121 is provided on the inner side wall of the middle section 12 of the longitudinal beam, and the installation position of the first reinforcing plate 121 corresponds to that of the hanging bracket 22.

[0044] It can be understood that the function of the first reinforcing plate 121 is to strengthen the structural strength of the middle section 12 of the longitudinal beam after connecting the hanging bracket 22 and avoid the deformation of the longitudinal beam caused by installation stress.

[0045] In some alternative embodiments, the electric commercial vehicle frame further includes a front bracket for installing a front independent suspension and a rear bracket for installing a rear independent suspension. The front bracket is located at the front section 11 of the longitudinal beam, and the rear bracket is located at the rear section 13 of the longitudinal beam.

[0046] Since the battery pack is arranged below the middle section 12 of the longitudinal beam of the vehicle frame and it is impossible to arrange the drive shaft below as in the traditional commercial vehicle structure, the front and rear independent suspension arrangements are adopted. This can not only increase the layout space of the battery pack, but also shorten the wheelbase of the whole vehicle to meet the design and manufacturing of commercial vehicles with short wheelbase and high endurance.

[0047] Furthermore, as Figure 5 shown, the front bracket includes a first pocket beam 3 and a second pocket beam 4 that are spaced and connected to the front section 11 of the longitudinal beam. Both ends of the first pocket beam 3 and the second pocket beam 4 are respectively connected to the outer sidewalls of the front section 11 of the longitudinal beam.

[0048] It can be understood that the first pocket beam 3 and the second pocket beam 4 not only provide an installation structure for the front independent suspension, but also replace the cross beam with a pocket beam to meet the stress and strength requirements of the vehicle frame. The first pocket beam 3 and the second pocket beam 4 are spaced apart, which also greatly improves the ability of the vehicle frame to resist torsion and deformation.

[0049] Optionally, lower supports 101 of the front independent suspension thrust rods are provided at the bottoms of both the first pocket beam 3 and the second pocket beam 4, and upper supports 102 of the front independent suspension thrust rods are provided on both sides of the first pocket beam 3. Through the first pocket beam 3, the second pocket beam 4, the lower supports 101 of the front independent suspension thrust rods, and the upper supports 102 of the front independent suspension thrust rods, upper and lower swing arm interfaces are provided for the front independent suspension, which is also beneficial to dispersing the conduction tensile and torsional moments of the front independent suspension through the above mechanism, reducing the generation of vehicle-specific parts, and providing a new way to reduce costs.

[0050] In some alternative embodiments, the rear bracket includes two rear independent suspension balance shaft brackets 9. Each of the rear independent suspension balance shaft brackets 9 is respectively connected to the outer sidewall of a rear section 13 of the longitudinal beam and is symmetrically arranged along the centerlines of the two longitudinal beams 1. A third cross beam 7 is provided on the inner walls of the two rear sections 13 of the longitudinal beam, and the connection points of the third cross beam 7 with the inner sidewalls of the rear sections 13 of the longitudinal beam correspond to the installation positions of the rear independent suspension balance shaft brackets 9.

[0051] It can be understood that the rear independent suspension balance shaft bracket 9 is provided with an interface for installing the rear independent suspension. The rear independent suspension balance shaft bracket 9 is a Y-shaped bracket, the open end of which is connected to the outer sidewall of the rear section 13 of the longitudinal beam, and the other end extends downward to the rear section 13 of the longitudinal beam, thereby improving the connection stability with the rear section 13 of the longitudinal beam. The third cross beam 7 is used to maintain the lateral spacing between the two rear sections 13 of the longitudinal beam when the rear independent suspension is provided, and improve the structural anti-torsion performance and lateral connection.

[0052] Therefore, the longitudinal length of the connection between the third cross beam 7 and the inner wall of the rear section 13 of the longitudinal beam covers the connection between the open end of the Y-shaped bracket and the outer sidewall of the rear section 13 of the longitudinal beam.

[0053] In some alternative embodiments, the frame of the above-mentioned electric commercial vehicle further includes a first crossbeam assembly 5. The first crossbeam assembly 5 includes two first crossbeam supports 51, two tow hooks 52 and a round tube beam 53. The two first crossbeam supports 51 are respectively connected to the inner side walls of the front section 11 of the longitudinal beam and are located at the end of the front section 11 of the longitudinal beam close to the vehicle head; the two tow hooks 52 are respectively connected to the two first crossbeam supports 51 and are integrally formed with the first crossbeam supports 51; both ends of the round tube beam 53 are respectively connected to the two first crossbeam supports 51.

[0054] It can be understood that the tow hook 52 is integrally formed with the first crossbeam support 51. Compared with directly connecting to the front section 11 of the longitudinal beam in the prior art, the stress on the front section 11 of the longitudinal beam when the tow hook 52 is stressed is reduced, and it is convenient for processing and installation.

[0055] In some alternative embodiments, the frame of the above-mentioned electric commercial vehicle further includes a second crossbeam 6 and a tail beam 8 that are spaced and connected to the rear section 13 of the longitudinal beam. Both ends of the second crossbeam 6 are respectively connected to the connection between the middle section 12 of the longitudinal beam and the rear section 13 of the longitudinal beam, and the tail beam 8 is located at the end of the rear section 13 of the longitudinal beam close to the vehicle tail.

[0056] In this example, the second crossbeam 6 is hourglass-shaped, that is, the longitudinal length of the ends of the second crossbeam 6 connected to the two rear sections 13 of the longitudinal beam is greater than the length of the middle part thereof. The purpose of this setting is to make the ends of the second crossbeam 6 cover the connection between the middle section 12 of the longitudinal beam and the rear section 13 of the longitudinal beam, and improve the structural strength of the connection.

[0057] In some alternative embodiments, a second reinforcing plate 71 is further provided on the inner wall of the third crossbeam 7 connected to the rear section 13 of the longitudinal beam.

[0058] It can be understood that the second reinforcing plate 71 covers the connection between the third crossbeam 7 and the rear section 13 of the longitudinal beam, thereby avoiding excessive stress at the connection and improving the structural strength.

[0059] On the other hand, the present application also provides a vehicle, including the frame of any of the above-mentioned electric commercial vehicles.

[0060] Specifically, the longitudinal beam 1 includes a front section 11, a middle section 12 and a rear section 13 of the longitudinal beam connected in sequence. The height of the bottom of the middle section 12 of the longitudinal beam spaced from the horizontal plane is greater than that of the front section 11 and the rear section 13 of the longitudinal beam; the battery box 2 is hoisted below the middle section 12 of the longitudinal beam. Multiple groups of frame crossbeams 21 on the top of the battery box 2 are arranged at intervals along the length direction of the middle section 12 of the longitudinal beam and are attached to the bottom of the middle section 12 of the longitudinal beam for forming a transverse connection between the two middle sections 12 of the longitudinal beam.

[0061] It can be understood that the middle section 12 of the longitudinal beam for hoisting the battery frame 2 has a smaller cross-section relative to the front section 11 and the rear section 13 of the longitudinal beam, so that more bottom space can be provided for hoisting the battery frame 2, and the problem of affecting the vehicle passability due to the battery frame 2 can be solved. Compared with placing the power battery on both sides of the longitudinal beam, which results in an overly wide vehicle width, or raising the vehicle frame and chassis to ensure passability, which causes too high a vehicle center of gravity, or reducing the battery capacity to reduce the battery layout volume, the variable cross-section longitudinal beam structure of the present application cooperates with the frame cross-beam of the battery frame, not only increasing the layout height of the battery frame, but also not affecting the structural strength of the longitudinal beam.

[0062] In some optional embodiments, five groups of the above-mentioned frame cross-beams 21 are provided at intervals. Two of the above-mentioned frame cross-beams 21 located on both sides in the length direction of the middle section 12 of the longitudinal beam include two sub-cross-beams, and the remaining above-mentioned frame cross-beams 21 include one sub-cross-beam. Each of the above-mentioned sub-cross-beams is connected to the outer wall of the middle section 12 of the longitudinal beam through a hanger 22.

[0063] It can be understood that the sub-cross-beam is connected to the outer wall of the middle section 12 of the longitudinal beam through the hanger 22, so that the sub-cross-beam is connected between the two longitudinal beams. The sub-cross-beam is both the frame structure of the battery frame 2 and also plays a role in laterally connecting the two middle sections 12 of the longitudinal beam. The detachable connection between the hanger 22 and the outer wall of the middle section 12 of the longitudinal beam facilitates the installation of the battery frame 2 and the middle section of the longitudinal beam, and improves the versatility of the vehicle frame. Two sub-cross-beams are provided for the two groups of frame cross-beams 21 located on the outermost sides, improving the structural strength and anti-torsion performance at the variable cross-section.

[0064] Preferably, the hanger 22 and the middle section 12 of the longitudinal beam are connected by bolts and gaskets.

[0065] Since the weight of the battery pack and the battery frame 2 is more than 7 tons, the connection of multiple sub-cross-beams is also beneficial to dispersing the tensile and torsional effects of the battery on the vehicle frame. Different from regarding the battery frame 2 as a part of the vehicle frame, the solution of the embodiment of the present application is convenient for installation and maintenance and easy to disassemble. The inside of the battery frame can be provided with an arched bracket, which is beneficial to improving the stiffness of the battery frame 2. The connection form between the battery frame 2 and the vehicle frame through the hanger 22 can also improve the strength and stiffness of the vehicle frame.

[0066] In some optional embodiments, the battery frame 2 further includes a main frame body 23, which is connected below multiple groups of frame cross-beams 21 and is used for placing the battery pack. The specific structure of the main frame body 23 is not limited herein. Those skilled in the art can set the main frame body to any structure according to the structure and installation requirements of the battery pack. The battery pack can be installed on the main frame body by means of sliding connection or snap connection, etc.

[0067] Preferably, the battery frame 2 further includes a longitudinal connection 24 which is arranged along the length direction of the middle section 12 of the longitudinal beam and is connected to the frame cross beam 21 and the middle section 12 of the longitudinal beam. In this example, the longitudinal connection 24 is a housing arranged above the frame cross beam 21, and the top of the housing is nearly horizontal with the top of the middle section 12 of the longitudinal beam and forms a rectangular frame structure with the main frame body 23 below the frame cross beam 21. The purpose of such an arrangement is not only to further utilize the space on the left and right sides, below, and in the middle of the middle section 12 of the longitudinal beam, providing a new arrangement method, but also to cancel the battery arrangement in the middle of the middle section 12 of the longitudinal beam and add a cross beam in case of severe working conditions, further strengthening the strength and stiffness space of the vehicle frame and improving the versatility and adaptability of the vehicle frame.

[0068] In some alternative embodiments, a first reinforcing plate 121 is provided on the inner side wall of the middle section 12 of the longitudinal beam, and the installation position of the first reinforcing plate 121 corresponds to that of the hanger 22.

[0069] It can be understood that the function of the first reinforcing plate 121 is to strengthen the structural strength of the middle section 12 of the longitudinal beam after connecting the hanger 22 and at the same time avoid the deformation of the longitudinal beam caused by installation stress.

[0070] In some alternative embodiments, the electric commercial vehicle frame further includes a front bracket for installing a front independent suspension and a rear bracket for installing a rear independent suspension. The front bracket is located on the front section 11 of the longitudinal beam, and the rear bracket is located on the rear section 13 of the longitudinal beam.

[0071] Since the battery pack is arranged below the middle section 12 of the longitudinal beam of the vehicle frame and it is impossible to arrange the drive shaft below as in the traditional commercial vehicle structure, the front and rear independent suspension arrangements are adopted. This can not only increase the arrangement space of the battery pack, but also shorten the wheelbase of the whole vehicle to meet the design and manufacturing of short wheelbase and high endurance of commercial vehicles.

[0072] Furthermore, the front bracket includes a first pocket beam 3 and a second pocket beam 4 which are spaced and connected to the front section 11 of the longitudinal beam, and both ends of the first pocket beam 3 and the second pocket beam 4 are respectively connected to the outer side wall of the front section 11 of the longitudinal beam.

[0073] It can be understood that the first pocket beam 3 and the second pocket beam 4 not only provide an installation structure for the front independent suspension, but also replace the cross beam with the pocket beam to meet the stress and strength requirements of the vehicle frame. The first pocket beam 3 and the second pocket beam 4 are spaced, which also greatly improves the ability of the vehicle frame to resist torsion and deformation.

[0074] Optionally, front independent suspension thrust rod lower supports 101 are provided at the bottoms of the first hopper beam 3 and the second hopper beam 4, and front independent suspension thrust rod upper supports 102 are provided on both sides of the first hopper beam 3. Through the first hopper beam 3 and the second hopper beam 4, as well as the front independent suspension thrust rod lower supports 101 and the front independent suspension thrust rod upper supports 102, upper and lower swing arm interfaces are provided for the front independent suspension, which also helps to disperse the conduction tensile and torsional torques of the front independent suspension through the above mechanisms, reduces the generation of vehicle-specific parts, and provides a new way to reduce costs.

[0075] In some alternative embodiments, the rear support includes two rear independent suspension balance shaft supports 9, each of the rear independent suspension balance shaft supports 9 is respectively connected to the outer side wall of a corresponding rear section 13 of the longitudinal beam, and is symmetrically arranged along the center line of the two longitudinal beams 1. A third cross beam 7 is provided on the inner walls of the two rear sections 13 of the longitudinal beam, and the connection point of the third cross beam 7 with the inner side wall of the rear section 13 of the longitudinal beam corresponds to the installation position of the rear independent suspension balance shaft support 9.

[0076] It can be understood that the rear independent suspension balance shaft support 9 is provided with an interface for installing the rear independent suspension. The rear independent suspension balance shaft support 9 is a Y-shaped support, the open end is connected to the outer side wall of the rear section 13 of the longitudinal beam, and the other end extends downward to the rear section 13 of the longitudinal beam, thereby improving the connection stability with the rear section 13 of the longitudinal beam. The third cross beam 7 is used to maintain the lateral spacing between the two rear sections 13 of the longitudinal beam when the rear independent suspension is provided, and improve the structural anti-torsion performance and lateral connection.

[0077] Therefore, the longitudinal length of the connection between the third cross beam 7 and the inner wall of the rear section 13 of the longitudinal beam covers the connection between the open end of the Y-shaped support and the outer side wall of the rear section 13 of the longitudinal beam.

[0078] In some alternative embodiments, the electric commercial vehicle frame further includes a first cross beam assembly 5. The first cross beam assembly 5 includes two first cross beam supports 51, two tow hooks 52 and a round tube beam 53. The two first cross beam supports 51 are respectively connected to the inner side walls of the front sections 11 of the longitudinal beam and are located at the ends of the front sections 11 of the longitudinal beam close to the vehicle head; the two tow hooks 52 are respectively connected to the two first cross beam supports 51 and are integrally formed with the first cross beam supports 51; the two ends of the round tube beam 53 are respectively connected to the two first cross beam supports 51.

[0079] It can be understood that the tow hook 52 is integrally formed with the first cross beam support 51. Compared with the prior art where it is directly connected to the front section 11 of the longitudinal beam, the stress on the front section 11 of the longitudinal beam when the tow hook 52 is stressed is reduced, and it is also convenient for processing and installation.

[0080] In some alternative embodiments, the frame of the electric commercial vehicle further includes a second cross beam 6 and a tail beam 8 which are spaced and connected to the rear section 13 of the longitudinal beam. Two ends of the second cross beam 6 are respectively connected to the connection part between the middle section 12 and the rear section 13 of the longitudinal beam. The tail beam 8 is located at the end of the rear section 13 of the longitudinal beam close to the vehicle tail.

[0081] In this example, the second cross beam 6 is in a hourglass shape, that is, the longitudinal length of the ends of the second cross beam 6 connected to the two rear sections 13 of the longitudinal beam is greater than the length of the middle part thereof. The purpose of such a setting is to enable the ends of the second cross beam 6 to cover the connection part between the middle section 12 and the rear section 13 of the longitudinal beam, thereby improving the structural strength of the connection part.

[0082] In some alternative embodiments, a second reinforcing plate 71 is further provided on the inner wall of the rear section 13 of the longitudinal beam where the third cross beam 7 is connected.

[0083] It can be understood that the second reinforcing plate 71 covers the connection part between the third cross beam 7 and the rear section 13 of the longitudinal beam, thereby avoiding excessive stress at the connection part and improving the structural strength.

[0084] For a frame and a vehicle of an electric commercial vehicle according to the present invention, by setting the longitudinal beam as a variable cross-section structure, reducing the cross-section height of the middle section of the longitudinal beam connected to the battery box, and hoisting the battery box below the middle section of the longitudinal beam, when the battery box is connected to the middle section of the longitudinal beam, the ground clearance of the battery box can be increased, solving the problem that the battery pack occupies the space at the bottom of the frame in the related art, and there is no need to raise the chassis or reduce the battery pack capacity; multiple groups of frame cross beams 21 of the battery box are attached to the bottom of the middle section 12 of the longitudinal beam and form a transverse connection between the two middle sections 12 of the longitudinal beam, which is beneficial to dispersing the tensile and torsional effects of the battery on the frame, and the grid-like structure can improve the structural stability of the middle section 12 of the longitudinal beam; by providing a front bracket for installing a front independent suspension and a rear bracket for installing a rear independent suspension, not only the layout space of the battery pack can be increased, but also the wheelbase of the whole vehicle can be shortened to meet the design and manufacture of short wheelbase and high endurance of commercial vehicles; the tow hook 52 and the first cross beam support 51 are integrally formed, compared with directly connecting to the front section 11 of the longitudinal beam in the prior art, reducing the stress on the front section 11 of the longitudinal beam when the tow hook 52 is stressed, and being convenient for processing and installation.

[0085] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0086] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0087] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. An electric commercial vehicle frame, characterized in that, Comprising: Two longitudinals (1) that are parallel to each other and spaced apart, the longitudinal (1) includes a front longitudinal section (11), a middle longitudinal section (12), and a rear longitudinal section (13) connected in sequence, and the height of the bottom of the middle longitudinal section (12) from the horizontal plane is greater than that of the front longitudinal section (11) and the rear longitudinal section (13); A battery frame (2), which is hoisted below the middle longitudinal section (12), and multiple groups of frame cross-beams (21) on the top of the battery frame (2) are arranged at intervals along the length direction of the middle longitudinal section (12), and are attached to the bottom of the middle longitudinal section (12) for forming a transverse connection between the two middle longitudinal sections (12); There are five groups of the frame cross-beams (21) arranged at intervals. Two groups of the frame cross-beams (21) on both sides of the length direction of the middle longitudinal section (12) include two sub-cross-beams, and the remaining frame cross-beams (21) include one sub-cross-beam. Each sub-cross-beam is connected to the outer side wall of the middle longitudinal section (12) through a hanger (22); A first reinforcing plate (121) is provided on the inner side wall of the middle longitudinal section (12), and the installation position of the first reinforcing plate (121) corresponds to that of the hanger (22); The battery frame (2) further includes a longitudinal connection (24), the longitudinal connection (24) is arranged along the length direction of the middle longitudinal section (12), and is connected to the frame cross-beam (21) and the middle longitudinal section (12); The battery frame (2) further includes a main frame body (23), and the main frame body (23) is connected below multiple groups of the frame cross-beams (21); The longitudinal connection (24) is a shell provided above the frame cross-beam (21). The top of the shell is nearly horizontal with the top of the middle longitudinal section (12), and forms a rectangular frame structure with the main frame body (23) below the frame cross-beam (21); It further includes a front bracket for installing a front independent suspension and a rear bracket for installing a rear independent suspension. The front bracket is located on the front longitudinal section (11), and the rear bracket is located on the rear longitudinal section (13); The front bracket includes a first sling beam (3) and a second sling beam (4) that are spaced and connected to the front longitudinal section (11), and both ends of the first sling beam (3) and the second sling beam (4) are respectively connected to the outer side wall of the front longitudinal section (11); It further includes a first cross-beam assembly (5), and the first cross-beam assembly (5) includes: Two first cross-beam supports (51), which are respectively connected to the inner side wall of the front longitudinal section (11) and are located at the end of the front longitudinal section (11) close to the vehicle head; Two tow hooks (52), which are respectively connected to the two first cross-beam supports (51) and are integrally formed with the first cross-beam supports (51); A round tube beam (53), the two ends of which are respectively connected to the two first cross-beam supports (51); It further includes a second cross-beam (6) and a tail beam (8) that are spaced and connected to the rear longitudinal section (13); The second cross-beam (6) is in an hourglass shape, and the longitudinal length of the end of the second cross-beam (6) connected to the two rear longitudinal sections (13) is greater than the length of the middle part thereof.

2. The electric commercial vehicle frame according to claim 1, characterized in that, The rear bracket includes two rear independent suspension balance shaft brackets (9), each of the rear independent suspension balance shaft brackets (9) is respectively connected to the outer side wall of a rear section (13) of the longitudinal beam, and is symmetrically arranged along the center line of the two longitudinal beams (1). A third cross beam (7) is provided on the inner walls of the two rear sections (13) of the longitudinal beam, and the connection point of the third cross beam (7) with the inner side wall of the rear section (13) of the longitudinal beam corresponds to the installation position of the rear independent suspension balance shaft bracket (9).

3. The electric commercial vehicle frame according to claim 1, characterized in that, Both ends of the second cross beam (6) are respectively connected to the connection part of the middle section (12) and the rear section (13) of the longitudinal beam, and the tail beam (8) is located at the end of the rear section (13) of the longitudinal beam close to the vehicle tail.

4. The electric commercial vehicle frame according to claim 2, characterized in that, A second reinforcing plate (71) is further provided on the inner wall of the rear section (13) of the longitudinal beam where the third cross beam (7) is connected.

5. A vehicle, characterized in that, It includes an electric commercial vehicle frame according to any one of claims 1-4.

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