Chassis and vehicle

Abstract

The utility model discloses a chassis and a vehicle. The chassis comprises a longitudinal beam; a rear axle assembly; the first cross beam comprises a first rectangular pipe, a second rectangular pipe and a middle bent pipe, the first rectangular pipe and the second rectangular pipe are located on the left side and the right side of the middle bent pipe, and the left end and the right end of the middle bent pipe are connected with the first rectangular pipe and the second rectangular pipe respectively. Therefore, the first rectangular pipe and the second rectangular pipe are arranged on the two sides of the middle bent pipe in the left-right direction respectively, on one hand, the first cross beam is simple in structure, the rectangular pipes are of mature structures and can be directly used, a stamping die needs to be independently developed, and cost can be reduced, and on the other hand, due to the fact that the middle bent pipe and the rectangular pipes are different in shape, cost is reduced. When the first cross beam is subjected to external force, the external force can be diffused to multiple different directions, so that the stress of the first cross beam is more uniform and stable, the maximum stress of the first cross beam can be improved, and the structural stability and reliability of the first cross beam can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a chassis and a vehicle. Background Art

[0002] In the existing vehicle frame, the middle cross beam is connected to the upper sides of the left and right longitudinal beams of the vehicle frame, playing a role in enhancing the lateral and torsional stiffness of the vehicle frame. Parts such as the fuel tank, the transmission shaft, and the exhaust pipe hook of a non-load-bearing chassis are also fixed on the middle cross beam of the vehicle frame. The middle cross beam of the existing scheme is composed of two or several relatively large stamping sheet metal parts.

[0003] In the related art, due to changes in the position, volume, or weight of the related components on the chassis, the chassis needs to bear greater loads. The strength of the original cross beam structure formed by the buckling of relatively large stamping sheet metal structures can no longer meet the requirements, resulting in unstable installation of components on the chassis. In addition, in order to control the development cost, the development of stamping dies should be minimized as much as possible. Therefore, there is an urgent need for a structural optimization scheme for the chassis. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a chassis with a simple structure, low cost, and greater structural strength.

[0005] The utility model further provides a vehicle.

[0006] The chassis according to an embodiment of the utility model includes: longitudinal beams, which extend in the front-rear direction and are two. The two longitudinal beams are respectively a first longitudinal beam and a second longitudinal beam, and the first longitudinal beam and the second longitudinal beam are spaced apart in the left-right direction; a fuel tank assembly, which is arranged between the two longitudinal beams and adjacent to the first longitudinal beam, and the fuel tank assembly is connected to the first longitudinal beam; a rear axle assembly, which includes a rear axle part and a transmission shaft. The transmission shaft extends in the front-rear direction. The fuel tank assembly is located between the first longitudinal beam and the transmission shaft in the left-right direction. The rear axle part extends in the left-right direction and is connected to the rear end of the transmission shaft. The rear axle part is adapted to be drivingly connected to the left and right rear wheels of the vehicle; a first cross beam, which extends in the left-right direction and includes a first rectangular tube, a second rectangular tube, and a middle bent tube. The first rectangular tube and the second rectangular tube are located on the left and right sides of the middle bent tube and are respectively connected to the two longitudinal beams. The left and right ends of the middle bent tube at least partially extend into the first rectangular tube and the second rectangular tube and are respectively connected to the first rectangular tube and the second rectangular tube.

[0007] Thus, by respectively arranging the first rectangular pipe and the second rectangular pipe on both sides of the middle elbow pipe in the left-right direction and connecting the first rectangular pipe and the second rectangular pipe to the longitudinal beam respectively, such an arrangement has the following advantages. On the one hand, the structure of the first cross beam is simple. The rectangular pipe is a mature structure and can be directly used without the need to develop a stamping die separately, which can reduce costs and facilitate the manufacture of the first cross beam and its installation on the chassis. On the other hand, due to the different shapes of the middle elbow pipe and the rectangular pipe, when the first cross beam is subjected to an external force, the first cross beam can disperse the external force to multiple different directions, so that the force on the first cross beam is more evenly and stably distributed, which can increase the maximum force that the first cross beam can withstand, and further improve the structural stability and reliability of the first cross beam.

[0008] According to some embodiments of the present invention, the middle elbow pipe includes an upper pipe body and a lower pipe body, and the upper pipe body and the lower pipe body are buckled and welded together.

[0009] According to some embodiments of the present invention, the part of the middle elbow pipe corresponding to the transmission shaft protrudes upward to avoid the transmission shaft. An installation bracket is arranged between the middle elbow pipe and the transmission shaft. The installation bracket includes a first bracket part, a second bracket part and a third bracket part. The first bracket part extends in the front-rear direction and is fixedly connected to the middle elbow pipe in a fitting manner. The third bracket part extends in the front-rear direction and is fixedly connected to the transmission shaft in a fitting manner. The second bracket part extends in the up-down direction and is connected to the first bracket part and the second bracket part at its upper and lower ends respectively. A reinforcing plate is arranged on the surface of the installation bracket, and the reinforcing plate is perpendicular to the surface of the installation bracket.

[0010] According to some embodiments of the present invention, limiting blocks are respectively arranged on the left and right sides of the first cross beam corresponding to the fuel tank assembly. A limiting inclined surface is arranged on the side of the limiting block facing the fuel tank assembly, and the limiting inclined surface is in limiting cooperation with the fuel tank assembly.

[0011] According to some embodiments of the present invention, the chassis further includes a first connecting plate. The first connecting plate includes a first plate segment, a second plate segment and a third plate segment. The first plate segment is located below the fuel tank assembly and is connected to the fuel tank assembly. The second plate segment and the third plate segment are respectively connected to the left and right sides of the first plate segment. The second plate segment and the third plate segment both extend upward relative to the first plate segment. The second plate segment and the third plate segment are both in contact with the fuel tank assembly and their upper ends are both connected to the first cross beam.

[0012] According to some embodiments of the present utility model, a fixing plate is provided on the first cross beam. The fixing plate includes a first sub-fixing plate and a second sub-fixing plate. The upper end of the first sub-fixing plate is connected to the first cross beam. The first sub-fixing plate extends in the up-and-down direction and the lower end thereof is connected to the second sub-fixing plate. The second sub-fixing plate extends in the left-and-right direction. The second sub-fixing plate is connected to the upper end of the first connecting plate. The fixing plate forms an avoidance space for avoiding the limit block.

[0013] According to some embodiments of the present utility model, the chassis further includes a second connecting plate. A second connecting plate is connected between the first rectangular tube and the first longitudinal beam. The second connecting plate is L-shaped and includes a fourth plate segment and a fifth plate segment. The fourth plate segment is connected to the upper side of the first longitudinal beam. The fifth plate segment is connected to the side of the first longitudinal beam facing the second longitudinal beam in the left-and-right direction and is fixedly connected to the fourth plate segment. The first rectangular tube is fixedly connected to both the fourth plate segment and the fifth plate segment; and / or a second connecting plate is connected between the second rectangular tube and the second longitudinal beam. The second connecting plate is L-shaped and includes a fourth plate segment and a fifth plate segment. The fourth plate segment is connected to the upper side of the second longitudinal beam. The fifth plate segment is connected to the side of the second longitudinal beam facing the first longitudinal beam in the left-and-right direction and is fixedly connected to the fourth plate segment. The second rectangular tube is fixedly connected to both the fourth plate segment and the fifth plate segment.

[0014] According to some embodiments of the present utility model, the chassis further includes a second cross beam. The second cross beam extends in the left-and-right direction and is spaced behind the first cross beam. The second cross beam includes an upper beam and a lower beam. The upper beam and the lower beam are arranged opposite to each other in the up-and-down direction and are connected to each other. The upper beam includes a main body segment and a plurality of welded segments. A plurality of welded segments are provided on both the left and right sides of the main body segment. The plurality of welded segments are welded and fixed to each other and are connected to the main body segment. The left and right ends of the lower beam are respectively connected to the two longitudinal beams. The plurality of welded segments on both the left and right sides of the main body segment are respectively connected to the two longitudinal beams.

[0015] According to some embodiments of the present utility model, the second cross beam includes a plurality of bent beam segments. The plurality of bent beam segments are connected to each other, and adjacent two bent beam segments are bent relatively.

[0016] The vehicle according to the present utility model includes the chassis described above.

[0017] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0019] Figure 1 is a partial schematic view of a chassis according to an embodiment of the present utility model;

[0020] Figure 2 is a partial schematic view of a chassis according to an embodiment of the present utility model;

[0021] Figure 3 is a partial schematic view of a chassis according to an embodiment of the present utility model;

[0022] Figure 4 is a partial exploded view of a chassis according to an embodiment of the present utility model;

[0023] Figure 5 is a partial schematic view of a chassis according to an embodiment of the present utility model.

[0024] Reference numerals:

[0025] 100, chassis;

[0026] 10, longitudinal beam; 11, first longitudinal beam; 12, second longitudinal beam;

[0027] 20, fuel tank assembly;

[0028] 30, rear axle assembly; 31, drive shaft;

[0029] 40, first cross beam; 41, first rectangular tube; 42, second rectangular tube; 43, middle bent tube; 431, upper tube body; 432, lower tube body; 44, limit block; 441, limit inclined surface; 45, fixing plate; 451, first sub-fixing plate; 452, second sub-fixing plate;

[0030] 50, mounting bracket; 51, first bracket part; 52, second bracket part; 53, third bracket part; 54, reinforcing plate;

[0031] 60, first connecting plate; 61, first plate section; 62, second plate section; 63, third plate section;

[0032] 70, second connecting plate; 71, fourth plate section; 72, fifth plate section;

[0033] 80, second cross beam; 81, upper beam; 811, main body section; 812, welded section; 82, lower beam; 83, bent beam section;

[0034] 90, third connecting plate. Detailed implementation manners

[0035] Embodiments of the present utility model will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present utility model will be described in detail below.

[0036] Reference will be made below Figures 1 - 5 to describe the chassis 100 according to an embodiment of the present utility model. The chassis 100 according to an embodiment of the present utility model can be applied to a vehicle.

[0037] In combination with Figures 1 - 3 as shown, the chassis 100 according to an embodiment of the present utility model mainly includes: longitudinal beams 10, a fuel tank assembly 20, a rear axle assembly 30, and a first cross beam 40. Among them, the longitudinal beams 10 extend in the front-rear direction and there are two of them. The two longitudinal beams 10 are respectively a first longitudinal beam 11 and a second longitudinal beam 12. The first longitudinal beam 11 and the second longitudinal beam 12 are spaced apart left and right. In this way, the balance of the chassis 100 in the left-right direction can be maintained, the stiffness of the longitudinal torsion of the whole vehicle can be improved, and stable support can be provided for other structures on the chassis 100 in the front-rear direction.

[0038] Furthermore, the fuel tank assembly 20 is arranged between the two longitudinal beams 10 and is adjacent to the first longitudinal beam 11. With such an arrangement, the fuel tank assembly 20 can avoid the position between the two longitudinal beams 10 close to the second longitudinal beam 12, so as to facilitate the arrangement of more components between the two longitudinal beams 10. The fuel tank assembly 20 is connected to the first longitudinal beam 11, so that the first longitudinal beam 11 can provide support for the fuel tank assembly 20 to realize the installation of the fuel tank assembly 20 on the chassis 100.

[0039] Furthermore, the chassis 100 further includes a rear axle assembly 30. The rear axle assembly 30 includes a rear axle part and a transmission shaft 31. The transmission shaft 31 extends in the front-rear direction. The fuel tank assembly 20 is located between the first longitudinal beam 11 and the transmission shaft 31 in the left-right direction. The rear axle part extends in the left-right direction and is connected to the rear end of the transmission shaft 31. The left and right ends of the rear axle part are adapted to be connected to the left and right rear wheels of the vehicle.

[0040] Specifically, the rear axle assembly 30 in the chassis 100 can transmit power to the rear wheels of the whole vehicle to drive the rear wheels of the vehicle to rotate. In the embodiment of the present utility model, the rear axle part of the rear axle assembly 30 extends left and right to transmit the driving force on the rear axle assembly 30 to the left and right rear wheels of the vehicle, and thus can drive the left and right rear wheels of the vehicle to rotate.

[0041] Furthermore, the transmission shaft 31 extends in the front-rear direction, which can enable the driving force in the chassis 100 to be transmitted in the front-rear direction. The rear end of the transmission shaft 31 is connected to the rear axle part, so that the power can be transmitted to the rear axle part through the transmission shaft 31 and then transmitted to the left and right rear wheels of the vehicle.

[0042] Furthermore, the first crossbeam extends in the left-right direction and includes a first rectangular tube, a second rectangular tube, and a middle bent tube. The first rectangular tube and the second rectangular tube are located on the left and right sides of the middle bent tube respectively and are connected to the two longitudinal beams respectively. At least part of the left and right ends of the middle bent tube extend into the first rectangular tube and the second rectangular tube respectively and are connected to the first rectangular tube and the second rectangular tube respectively.

[0043] Specifically, in the embodiment of the present invention, the first crossbeam 40 is composed of a first rectangular tube 41, a second rectangular tube 42, and a middle bent tube 43. Among them, both the first rectangular tube 41 and the second rectangular tube 42 are rectangular steel pipes. The rectangular steel pipe is an existing mature structure and can be used only through cutting processing. In this way, the development of the stamping die for the first crossbeam 40 can be reduced, and the investment in the cost of the stamping die for the first crossbeam 40 can be reduced, and the manufacturing cost is low.

[0044] In the embodiment of the present invention, the transmission shaft 31 passes below the middle bent tube 43, and a vehicle body floor skeleton is arranged above the first crossbeam 40. In this way, not only does the middle bent tube 43 need to avoid the jumping space for the transmission shaft 31 below, but also enough assembly clearance needs to be left above. However, a straight rectangular tube cannot meet the layout requirements.

[0045] Furthermore, by respectively arranging the first rectangular tube 41 and the second rectangular tube 42 on the left and right sides of the middle bent tube 43 in the left-right direction and making the first rectangular tube 41 and the second rectangular tube 42 be connected to the longitudinal beam 10 respectively. With such an arrangement, on the one hand, the structure of the first crossbeam 40 is simple, which is convenient for the manufacture of the first crossbeam 40 and its installation on the chassis 100, and there is no need to develop a separate stamping die, and the cost is relatively low. On the other hand, due to the different shapes of the middle bent tube 43 and the rectangular tube, when the first crossbeam 40 is subjected to an external force, the first crossbeam 40 can spread the external force to multiple different directions, so that the force on the first crossbeam 40 is more uniform and stable, the maximum force that the first crossbeam 40 can bear can be increased, and thus the structural stability and reliability of the first crossbeam 40 can be improved.

[0046] Combined with Figure 1As shown, the middle elbow 43 includes an upper pipe body 431 and a lower pipe body 432. The upper pipe body 431 and the lower pipe body 432 are buckled with each other and fixed by welding. Specifically, the middle elbow 43 is set to have a compositional structure of the upper pipe body 431 and the lower pipe body 432 fixed by buckling and welding. Both the upper pipe body 431 and the lower pipe body 432 are small-sized stamping sheet metal parts. Here, stamping means are used to facilitate making a more complex bending structure, so as to simultaneously meet the clearance requirements between the first cross beam 40, the transmission shaft 31, and the vehicle body floor skeleton. In addition, the upper pipe body 431 and the lower pipe body 432 are fixed by buckling and welding, which can improve the structural strength of the first cross beam 40, and thus can provide stable and reliable support for the components on the chassis 100.

[0047] Combined with Figure 2 As shown, the part of the middle elbow 43 corresponding to the transmission shaft 31 protrudes upward to avoid the transmission shaft 31. In this way, when the transmission shaft 31 extends forward and backward, it is convenient for the transmission shaft 31 to pass under the middle elbow 43, and the middle elbow 43 can provide a jumping space for the transmission shaft 31 to prevent interference between the transmission shaft 31 and the middle elbow 43 when the transmission shaft 31 jumps.

[0048] Furthermore, an installation bracket 50 is provided between the middle elbow 43 and the transmission shaft 31. The installation bracket 50 includes a first bracket part 51, a second bracket part 52, and a third bracket part 53. The first bracket part 51 extends in the front-back direction and is fixedly connected in a fitting manner with the middle elbow 43, which can ensure the reliability of the setting of the first bracket part 51 on the middle elbow 43. The third bracket part 53 extends in the front-back direction and is fixedly connected in a fitting manner with the transmission shaft 31, which can ensure the connection reliability between the third bracket part 53 and the transmission shaft 31.

[0049] The second bracket part 52 extends in the up-down direction, and its upper and lower ends are respectively connected to the first bracket part 51 and the second bracket part 52, so that the first bracket part 51, the second bracket part 52, and the third bracket part 53 form an integral structure, which is beneficial to improving the structural strength of the installation bracket 50. A reinforcing plate 54 is provided on the surface of the installation bracket 50, and the reinforcing plate 54 is perpendicular to the surface of the installation bracket 50. With such a setting, the torsional resistance of the installation bracket 50 can be improved through the reinforcing plate 54, and further the connection strength between the transmission shaft 31 and the middle elbow 43 can be increased, which is beneficial to enhancing the overall structural strength of the chassis 100.

[0050] Combined with Figure 3As shown, on the left and right sides of the first crossbeam 40 corresponding to the fuel tank assembly 20, limit blocks 44 are respectively provided. The first crossbeam 40 can provide stable and reliable support for the limit blocks 44, ensuring the structural stability of the limit blocks 44 on the chassis 100. On the side of the limit block 44 facing the fuel tank assembly 20, a limit inclined surface 441 is provided, which is convenient for the limit inclined surface 441 to be in limit cooperation with the fuel tank assembly 20, increasing the contact area between the limit block 44 and the fuel tank assembly 20, thereby improving the convenience and reliability of the cooperation between the limit block 44 and the fuel tank assembly 20. With such a setting, the structural stability of the fuel tank assembly 20 on the chassis 100 can be ensured.

[0051] Combined with Figure 3 As shown, the chassis 100 further includes a first connecting plate 60. The first connecting plate 60 includes a first plate segment 61, a second plate segment 62, and a third plate segment 63. The first plate segment 61 is located below the fuel tank assembly 20 and is connected to the fuel tank assembly 20, enabling the first connecting plate 60 to be stably arranged on the fuel tank assembly 20. The second plate segment 62 and the third plate segment 63 are respectively connected to the left and right sides of the first plate segment 61. The second plate segment 62 and the third plate segment 63 both extend upward relative to the first plate segment 61, and their upper ends are both connected to the first crossbeam 40. In this way, the first plate segment 61, the second plate segment 62, the third plate segment 63, and the first crossbeam 40 jointly form the installation position of the fuel tank assembly 20 on the chassis 100, facilitating the fixing of the fuel tank assembly 20 on the chassis 100.

[0052] Furthermore, the second plate segment 62 and the third plate segment 63 are both in close contact with the fuel tank assembly 20, which can ensure that the second plate segment 62 and the third plate segment 63 both provide lateral support for the fuel tank assembly 20, prevent the fuel tank assembly 20 from tipping over, and ensure the structural stability of the fuel tank assembly 20 on the first connecting plate 60.

[0053] Combined with Figure 3 As shown, a fixing plate 45 is provided on the first crossbeam 40. The fixing plate 45 includes a first sub-fixing plate 451 and a second sub-fixing plate 452. The upper end of the first sub-fixing plate 451 is connected to the first crossbeam 40. The first sub-fixing plate 451 extends in the up and down direction and its lower end is connected to the second sub-fixing plate 452. The second sub-fixing plate 452 extends in the left and right direction, and the second sub-fixing plate 452 is connected to the upper end of the first connecting plate 60.

[0054] Specifically, in the embodiment of the present utility model, the fixing plate 45 is adapted to connect the first connecting plate 60 and the first crossbeam 40, and the fixing plate 45 is arranged at the upper end of at least one of the second plate segment 62 and the third plate segment 63.

[0055] Further, in the structure of the fixing plate 45, the upper end of the first sub-fixing plate 451 is connected to the first cross beam 40 to ensure the reliable setting of the fixing plate 45 on the first cross beam 40. The second sub-fixing plate 452 is fixed to the upper end of the first connecting plate 60 to ensure the reliable connection between the fixing plate 45 and the first connecting plate 60.

[0056] Further, the first sub-fixing plate 451 extends in the up-down direction so that the fixing plate 45 approaches the first connecting plate 60 from the first cross beam 40. The second sub-fixing plate 452 extends in the left-right direction to increase the setting area of the fixing plate 45 in the left-right direction. This not only facilitates the connection between the upper end of the first connecting plate 60 and the fixing plate 45, but also helps to improve the connection reliability between the first connecting plate 60 and the fixing plate 45.

[0057] Combined with Figure 3 As shown, the fixing plate 45 is located below the first cross beam 40, and the first sub-fixing plate 451 extends in the up-down direction, and the second sub-fixing plate 452 extends in the left-right direction. In this way, an avoidance space can be formed below the first cross beam 40 to avoid the setting of the limit block 44, which can ensure the reliable limit cooperation between the limit block 44 and the left and right sides of the fuel tank assembly 20, and further ensure the position stability of the fuel tank assembly 20 arranged between the first connecting plate 60 and the first cross beam 40.

[0058] Combined with Figure 1 、 Figure 3 and Figure 4 As shown, the chassis 100 further includes a second connecting plate 70. A second connecting plate 70 is connected between the first rectangular tube 41 and the first longitudinal beam 11. The second connecting plate 70 is L-shaped and includes a fourth plate segment 71 and a fifth plate segment 72. The fourth plate segment 71 is connected to the upper side of the first longitudinal beam 11, and the fifth plate segment 72 is connected to the side of the first longitudinal beam 11 facing the second longitudinal beam 12 in the left-right direction and is fixedly connected to the fourth plate segment 71. The first rectangular tube 41 is fixedly connected to both the fourth plate segment 71 and the fifth plate segment 72.

[0059] Specifically, the second connecting plate 70 is an L-shaped plate. The L-shaped plate includes a fourth plate segment 71 extending left and right and a fifth plate segment 72 extending up and down. When installing the second connecting plate 70, the fourth plate segment 71 is flush with the upper side of the first longitudinal beam 11, and at the same time, the fifth plate segment 72 can be flush with the side of the first longitudinal beam 11 facing the second longitudinal beam 12 in the left-right direction. Such a setting can make the fourth plate segment 71 and the fifth plate segment 72 evenly fit and connect to the surface of the first longitudinal beam 11 to ensure the reliable setting of the second connecting plate 70 on the first longitudinal beam 11.

[0060] In an embodiment of the present utility model, the first rectangular tube 41 is connected to the first longitudinal beam 11. The fourth plate segment 71 and the fifth plate segment 72 can provide support for the first rectangular tube 41 in the left - right direction and the up - down direction. With such an arrangement, on the one hand, the support reliability of the first connecting plate 60 for the first rectangular tube 41 can be improved. On the other hand, when the first rectangular tube 41 is stressed, the force can spread to the first longitudinal beam 11 simultaneously in the left - right direction and the up - down direction. In this way, the force transmitted to the first longitudinal beam 11 can be dispersed, which is beneficial to improving the fatigue life of the first longitudinal beam 11.

[0061] According to an embodiment of the present utility model, a second connecting plate 70 is connected between the second rectangular tube 42 and the second longitudinal beam 12. The second connecting plate 70 is L - shaped and includes a fourth plate segment 71 and a fifth plate segment 72. The fourth plate segment 71 is connected to the upper side of the second longitudinal beam 12, and the fifth plate segment 72 is connected to the side of the second longitudinal beam 12 facing the first longitudinal beam 11 in the left - right direction and is fixedly connected to the fourth plate segment 71. The second rectangular tube 42 is fixedly connected to both the fourth plate segment 71 and the fifth plate segment 72.

[0062] Specifically, the second connecting plate 70 is an L - shaped plate. The L - shaped plate includes a fourth plate segment 71 extending left - right and a fifth plate segment 72 extending up - down. When installing the second connecting plate 70, the fourth plate segment 71 is flush with the upper side of the second longitudinal beam 12, and at the same time, the fifth plate segment 72 can be made flush with the side of the second longitudinal beam 12 facing the second longitudinal beam 12 in the left - right direction. With such an arrangement, the fourth plate segment 71 and the fifth plate segment 72 can be evenly and fittingly connected to the surface of the second longitudinal beam 12 to ensure the installation reliability of the second connecting plate 70 on the second longitudinal beam 12.

[0063] In an embodiment of the present utility model, the second rectangular tube 42 is connected to the second longitudinal beam 12. The fourth plate segment 71 and the fifth plate segment 72 can provide support for the second rectangular tube 42 in the left - right direction and the up - down direction. With such an arrangement, on the one hand, the support reliability of the second connecting plate 70 for the second rectangular tube 42 can be improved. On the other hand, when the second rectangular tube 42 is stressed, the force can spread to the second longitudinal beam 12 simultaneously in the left - right direction and the up - down direction. In this way, the force transmitted to the second longitudinal beam 12 can be dispersed, which is beneficial to improving the fatigue life of the second longitudinal beam 12.

[0064] According to some embodiments of the present utility model, a first connecting plate 60 is connected between the first rectangular tube 41 and the first longitudinal beam 11. According to other embodiments of the present utility model, a second connecting plate 70 is connected between the second rectangular tube 42 and the second longitudinal beam 12. According to still other embodiments of the present utility model, a first connecting plate 60 is connected between the first rectangular tube 41 and the first longitudinal beam 11, and a second connecting plate 70 is connected between the second rectangular tube 42 and the second longitudinal beam 12.

[0065] Combined with Figure 1 andFigure 5 As shown, the chassis 100 further includes a second cross beam 80 which extends in the left-right direction, so that the left and right ends of the second cross beam 80 are connected to the two longitudinal beams 10, thereby increasing the torsional resistance of the chassis 100 in the left-right direction. The second cross beam 80 is spaced behind the first cross beam 40.

[0066] Further, the second cross beam 80 includes an upper beam 81 and a lower beam 82 which are arranged opposite to each other vertically and are connected to each other. In the embodiment of the present utility model, both the upper beam 81 and the lower beam 82 are stamping parts, and the upper beam 81 and the lower beam 82 are fixed by snap welding, which can ensure the structural strength of the second cross beam 80, and thus can ensure the overall structural strength of the chassis 100.

[0067] In the embodiment of the present utility model, the fuel tank assembly 20 is arranged above the second cross beam 80 and is fixedly connected to the second cross beam 80. The lower beam 82 is partially bent upward to avoid the fixing surface of the fuel tank assembly 20, so that a local bending structure is formed on the second cross beam 80.

[0068] Further, the upper beam 81 includes a main body section 811 and a plurality of welded sections 812. A plurality of welded sections 812 are arranged on both the left and right sides of the main body section 811. The plurality of welded sections 812 correspond to the part of the lower beam 82 that avoids the fixing surface of the fuel tank assembly 20, and this part is composed of a plurality of welded sections 812, which can change the structural trend of the upper beam 81 here, and can make the upper beam 81 suitable for matching with the lower beam 82 after avoidance, so as to ensure the structural strength of the second cross beam 80.

[0069] Further, the plurality of welded sections 812 are welded and fixed to each other and are connected to the main body section 811, which can ensure the structural integrity and reliability of the upper beam 81. The left and right ends of the lower beam 82 are respectively connected to the two longitudinal beams 10, and the plurality of welded sections 812 on both the left and right sides of the main body section 811 are respectively connected to the two longitudinal beams 10, so that the left and right ends of the second cross beam 80 are connected to the two longitudinal beams 10, and thus the second cross beam 80 bent due to avoiding the fixing surface of the fuel tank assembly 20 can be better connected to the two longitudinal beams 10. In the embodiment of the present utility model, the welded section 812 includes but is not limited to a U-shaped structure, which can facilitate the connection and fixation of the welded section 812 to the lower beam 82.

[0070] In an embodiment of the present utility model, third connecting plates 90 are respectively arranged between the left and right ends of the second cross beam 80 and the two longitudinal beams 10. The third connecting plates 90 are L-shaped plates, and the L-shaped plates include a fourth plate segment 71 extending left and right and a fifth plate segment 72 extending up and down. The fourth plate segment 71 is connected to the upper side of the longitudinal beam 10, and the fifth plate segment 72 is connected to the side of the longitudinal beam 10 facing the second longitudinal beam 12 in the left-right direction. With such an arrangement, on the one hand, the support reliability of the third connecting plate 90 for the second cross beam 80 can be improved; on the other hand, when the second cross beam 80 is stressed, the force can spread to the longitudinal beam 10 simultaneously in the left-right direction and the up-down direction, so that the force transmitted to the longitudinal beam 10 can be dispersed, which is beneficial to improving the fatigue life of the longitudinal beam 10.

[0071] Combined with Figure 5 As shown, the second cross beam 80 includes a plurality of bent beam segments 83, and the plurality of bent beam segments 83 are connected to each other. Adjacent two bent beam segments 83 are arranged to be bent relatively. With such an arrangement, on the one hand, the second cross beam 80 can avoid the arrangement of components in the chassis 100, and the bent beam segments 83 on the second cross beam 80 can be arranged according to the dimensions and installation positions of the components in the chassis 100; on the other hand, the compressive performance and anti-torsion performance of the bent beam segments 83 are better, which is beneficial to improving the structural strength of the second cross beam 80, and thus beneficial to improving the overall structural strength of the chassis 100.

[0072] According to an embodiment of the present utility model, a vehicle includes the chassis 100 in the embodiment of the present utility model. Applying the chassis of the present utility model to a vehicle can not only improve the load-bearing capacity of the vehicle, improve the stability and reliability of the vehicle, but also keep the vehicle stable when the vehicle is driving on different road surfaces, and can improve the performance of the vehicle.

[0073] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0074] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A chassis, characterized in that: include: A longitudinal beam, wherein the longitudinal beam is extended in the front-rear direction and is in two pieces, the two longitudinal beams are respectively a first longitudinal beam and a second longitudinal beam, and the first longitudinal beam and the second longitudinal beam are spaced apart in the left-right direction; A fuel tank assembly, the fuel tank assembly is disposed between the two longitudinal beams and adjacent to the first longitudinal beam, and the fuel tank assembly is connected to the first longitudinal beam; A rear axle assembly, the rear axle assembly comprising a rear axle member and a transmission shaft, the transmission shaft extending in the front-rear direction, the fuel tank assembly being located between the first longitudinal beam and the transmission shaft in the left-right direction, the rear axle member extending in the left-right direction and connected to the rear end of the transmission shaft, the rear axle member being suitable for transmission connection with the left and right rear wheels of the vehicle; A first cross beam, the first cross beam extends in the left-right direction and includes a first rectangular tube, a second rectangular tube and a middle bent tube, the first rectangular tube and the second rectangular tube are located on the left and right sides of the middle bent tube and are respectively connected to the two longitudinal beams, and the left and right ends of the middle bent tube at least partially extend into the first rectangular tube and the second rectangular tube and are respectively connected to the first rectangular tube and the second rectangular tube.

2. The chassis according to claim 1, characterized in that: The middle bent pipe comprises an upper pipe body and a lower pipe body, and the upper pipe body and the lower pipe body are buckled with each other and fixed by welding.

3. The chassis according to claim 1, characterized in that: The part of the middle bend pipe corresponding to the transmission shaft is protruded upward to avoid the transmission shaft. A mounting bracket is arranged between the middle bend pipe and the transmission shaft. The mounting bracket includes a first bracket portion, a second bracket portion and a third bracket portion. The first bracket portion is extended in the front-to-back direction and is fitted and fixed to the middle bend pipe. The third bracket portion is extended in the front-to-back direction and is fitted and fixed to the transmission shaft. The second bracket portion extends in the up-down direction and the upper and lower ends are respectively connected to the first bracket portion and the second bracket portion. A reinforcing plate is arranged on the surface of the mounting bracket, and the reinforcing plate and the surface of the mounting bracket are perpendicular to each other.

4. The chassis according to claim 1, characterized in that: The first cross beam is provided with limit blocks on the left and right sides corresponding to the oil tank assembly, respectively. The limit block is provided with a limit inclined surface on one side facing the oil tank assembly, and the limit inclined surface cooperates with the oil tank assembly in a limit manner.

5. The chassis according to claim 4, characterized in that: It also includes a first connecting plate, which includes a first plate segment, a second plate segment and a third plate segment. The first plate segment is located at the lower side of the fuel tank assembly and is connected to the fuel tank assembly. The second plate segment and the third plate segment are respectively connected to the left and right sides of the first plate segment. The second plate segment and the third plate segment are both extended upward relative to the first plate segment. The second plate segment and the third plate segment are both in contact with the fuel tank assembly and their upper ends are connected to the first crossbeam.

6. The chassis according to claim 5, characterized in that A fixing plate is provided on the first crossbeam, and the fixing plate includes a first sub-fixing plate and a second sub-fixing plate, the upper end of the first sub-fixing plate is connected to the first crossbeam, the first sub-fixing plate is extended in the up-down direction and the lower end is connected to the second sub-fixing plate, the second sub-fixing plate is extended in the left-right direction, the second sub-fixing plate is connected to the upper end of the first connecting plate, and an avoidance space is formed on the fixing plate, and the avoidance space avoids the limit block.

7. The chassis according to claim 1, characterized in that: It also includes a second connecting plate, the second connecting plate is connected between the first rectangular tube and the first longitudinal beam, the second connecting plate is L-shaped and includes a fourth plate segment and a fifth plate segment, the fourth plate segment is connected to the upper side of the first longitudinal beam, the fifth plate segment is connected to a side of the first longitudinal beam in the left-right direction facing the second longitudinal beam and is connected and fixed to the fourth plate segment, and the first rectangular tube is connected and fixed to both the fourth plate segment and the fifth plate segment; and / or A second connecting plate is connected between the second rectangular tube and the second longitudinal beam. The second connecting plate is L-shaped and includes a fourth plate segment and a fifth plate segment. The fourth plate segment is connected to the upper side of the second longitudinal beam, the fifth plate segment is connected to a side of the second longitudinal beam in the left-right direction facing the first longitudinal beam and is connected and fixed to the fourth plate segment. The second rectangular tube is connected and fixed to both the fourth plate segment and the fifth plate segment.

8. The chassis according to claim 1, characterized in that: It also includes a second crossbeam, which is extended in the left-right direction and is spaced apart on the rear side of the first crossbeam, the second crossbeam includes an upper beam and a lower beam, the upper beam and the lower beam are arranged opposite to each other up and down and connected to each other, the upper beam includes a main section and a plurality of welded sections, a plurality of welded sections are arranged on the left and right sides of the main section, the plurality of welded sections are welded and fixed to each other and connected to the main section, the left and right ends of the lower beam are respectively connected to the two longitudinal beams, and the plurality of welded sections on the left and right sides of the main section are respectively connected to the two longitudinal beams.

9. The chassis according to claim 8, characterized in that The second cross beam includes a plurality of bent beam segments, the plurality of bent beam segments are connected to each other, and two adjacent bent beam segments are bent relative to each other.

10. A vehicle, characterized in that: A chassis comprising the chassis described in any one of claims 1-9.

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