Floor longitudinal beam arrangement structure

Abstract

The utility model provides a floor longitudinal beam arrangement structure which comprises a left longitudinal beam, a right longitudinal beam, a floor front cross beam and a floor rear cross beam, the left longitudinal beam and the right longitudinal beam define a frame structure through the floor front cross beam and the floor rear cross beam, and the left longitudinal beam and the right longitudinal beam are equal in front-back height. And a flat supporting surface is formed between the floor front cross beam and the floor rear cross beam. According to the floor longitudinal beam arrangement structure, the floor of the cab is smoother, the internal space of the cab is increased, and the riding comfort of the cab is improved. Meanwhile, the floor longitudinal beam arrangement structure is better in overall strength conduction, stress concentration is not prone to occurring, and the overall stability and the bearing capacity of a vehicle body are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of commercial vehicle bodies, and particularly relates to a floor longitudinal beam layout structure. Background Art

[0002] The floor skeleton of a commercial vehicle cab is a key part of the commercial vehicle body structure. It not only bears the weight inside the cab but also is directly related to the rigidity, safety, and riding comfort of the vehicle body. Currently, the market share of pure electric commercial vehicles has far exceeded that of traditional fuel vehicles.

[0003] Since the engine and front wheels are arranged at the lower part of the middle and rear sections of the floor of traditional fuel vehicles, in order to adapt to the layout space of the engine and front wheels, the middle and rear parts of the cab floor bulge upward to form a bump. Most of the existing pure electric commercial vehicles or hybrid electric commercial vehicles in the market follow this design, resulting in waste of the space under the bump and a relatively small cab space. At the same time, this floor structure has poor rigidity, which also affects the safety and riding comfort of the vehicle body. Summary of the Utility Model

[0004] The utility model provides a floor longitudinal beam layout structure to solve at least one of the above technical problems.

[0005] The technical solution adopted by the utility model is as follows: a floor longitudinal beam layout structure includes a left longitudinal beam, a right longitudinal beam, a front floor cross beam, and a rear floor cross beam. The left longitudinal beam and the right longitudinal beam are enclosed by the front floor cross beam and the rear floor cross beam to form a frame structure. The front and rear heights of the left longitudinal beam and the right longitudinal beam are the same, and a flat support surface is formed between the front floor cross beam and the rear floor cross beam.

[0006] Further, the floor longitudinal beam layout structure further includes a reinforcing beam structure, and the reinforcing beam structure is connected to the middle parts of the left longitudinal beam and the right longitudinal beam.

[0007] Further, the reinforcing beam structure is an "H" - shaped structure.

[0008] Further, the reinforcing beam structure includes a front longitudinal beam connecting beam connected between the left longitudinal beam and the right longitudinal beam, a rear longitudinal beam connecting beam, and an intermediate connecting beam connected between the front longitudinal beam connecting beam and the rear longitudinal beam connecting beam.

[0009] Further, the floor longitudinal beam layout structure is a convex - shaped structure that is narrow in the front and wide in the rear.

[0010] Further, the front ends of the left longitudinal beam and the right longitudinal beam are respectively provided with a front section of the left longitudinal beam and a front section of the right longitudinal beam for connecting with the front floor cross beam.

[0011] Further, both the left longitudinal beam and the right longitudinal beam are provided with installation positioning holes for cooperation with the tooling during assembly.

[0012] Further, the installation positioning holes on the left longitudinal beam include a left longitudinal beam secondary positioning hole and a left longitudinal beam primary positioning hole, and the installation positioning holes on the right longitudinal beam include a right longitudinal beam primary positioning hole and a right longitudinal beam secondary positioning hole.

[0013] Compared with the prior art, the floor longitudinal beam layout structure of the present utility model mainly has the following advantages:

[0014] 1. The left longitudinal beam and the right longitudinal beam of the floor longitudinal beam layout structure of the present utility model are at the same height front and back, forming a flat support surface between the front floor cross beam and the rear floor cross beam, making the cab floor more flat, reducing the space waste under the cab floor, increasing the internal space of the cab, and improving the riding comfort of the cab.

[0015] 2. The left longitudinal beam, the right longitudinal beam and the reinforcing beam structure of the floor longitudinal beam layout structure of the present utility model enable

[0016] the overall force transmission of the floor longitudinal beam layout structure to be better, not prone to stress concentration, and improving the overall stability and load-bearing capacity of the vehicle body.

[0017] 3. Both the left longitudinal beam and the right longitudinal beam of the floor longitudinal beam layout structure of the present utility model are provided with installation positioning holes, avoiding the accumulation of errors caused by the stacking of long dimension chains during the welding process, and improving the welding accuracy of vehicle body assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of the floor longitudinal beam layout structure of the present utility model;

[0019] Figure 2 is a top view of the floor longitudinal beam layout structure of the present utility model;

[0020] In the figure: 1. Left longitudinal beam; 2. Front section of left longitudinal beam; 3. Front floor cross beam; 4. Front section of right longitudinal beam; 5. Right longitudinal beam; 6. Front connecting beam of longitudinal beam; 7. Intermediate connecting beam; 8. Rear connecting beam of longitudinal beam; 9. Rear floor cross beam; 10. Right longitudinal beam primary positioning hole; 11. Right longitudinal beam secondary positioning hole; 12. Left longitudinal beam secondary positioning hole; 13. Left longitudinal beam primary positioning hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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, and therefore should not be construed as a limitation to the present utility model.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] As Figure 1 shown, the present utility model provides a floor longitudinal beam arrangement structure, including a left longitudinal beam 1, a right longitudinal beam 5, a front floor cross beam 3, and a rear floor cross beam 9. The front ends of the left longitudinal beam 1 and the right longitudinal beam 5 are both welded to the front floor cross beam 3, and the rear ends of the left longitudinal beam 1 and the right longitudinal beam 5 are both welded to the rear floor cross beam 9. The left longitudinal beam 1, the right longitudinal beam 5, the front floor cross beam 3, and the rear floor cross beam 9 enclose a frame structure. The left longitudinal beam 1 and the right longitudinal beam 5 are at the same height front and back, forming a flat support surface between the front floor cross beam 3 and the rear floor cross beam 9. This makes the cab floor flatter, reduces the space waste under the cab floor, increases the internal space of the cab, and improves the riding comfort of the cab.

[0025] In some embodiments, as Figure 1 、 Figure 2As shown, the floor longitudinal beam arrangement structure further includes a reinforcing beam structure, and the reinforcing beam structure is connected to the middle parts of the left longitudinal beam 1 and the right longitudinal beam 5. The reinforcing beam structure is in an "H" shape, including a longitudinally front connecting beam 6 and a longitudinally rear connecting beam 8 arranged horizontally, and an intermediate connecting beam 7 arranged vertically. The two ends of the longitudinally front connecting beam 6 and the longitudinally rear connecting beam 8 are respectively welded to the left longitudinal beam 1 and the right longitudinal beam 5, and the two ends of the intermediate connecting beam 7 are respectively welded to the longitudinally front connecting beam 6 and the longitudinally rear connecting beam 8. The left longitudinal beam 1, the right longitudinal beam 5 and the reinforcing beam structure are welded together to form a grid structure, and through the connection of multiple beams and nodes, a whole stress-bearing system is formed. When an external force acts on the structure, the force can be dispersed and transmitted through multiple paths, avoiding excessive pressure on a single path, thereby reducing the possibility of stress concentration. This way of dispersing the force improves the overall stability and load-bearing capacity of the structure. At the same time, due to the good integrity and stability of the grid structure, it can adapt to a variety of complex working conditions.

[0026] In some embodiments, the front parts of the left longitudinal beam 1 and the right longitudinal beam 5 are respectively provided with a left front longitudinal beam section 2 and a right front longitudinal beam section 4 for connecting with the front floor cross beam 3. The connection methods between the left front longitudinal beam section 2 and the left longitudinal beam 1, and between the right front longitudinal beam section 4 and the right longitudinal beam 5 can be selected according to actual needs. For example, the left front longitudinal beam section 2 and the left longitudinal beam 1 can be connected by welding, or the left front longitudinal beam section 2 and the left longitudinal beam 1 can be integrally formed.

[0027] In some embodiments, as Figure 2 shown, the rear parts of the left longitudinal beam 1 and the right longitudinal beam 5 respectively bulge outwards in an eight-shaped structure, so that the floor longitudinal beam arrangement structure is in a convex shape with a narrow front and a wide rear.

[0028] In some embodiments, as Figure 2 shown, both the left longitudinal beam 1 and the right longitudinal beam 5 are provided with installation positioning holes for cooperating with the tooling during assembly. The installation positioning holes on the left longitudinal beam 1 include a left longitudinal beam main positioning hole 13 provided at the front of the left longitudinal beam 1 and a left longitudinal beam secondary positioning hole 12 provided at the tail of the left longitudinal beam 1. The installation positioning holes on the right longitudinal beam 5 include a right longitudinal beam main positioning hole 10 provided at the front of the right longitudinal beam 5 and a right longitudinal beam secondary positioning hole 11 provided at the tail of the right longitudinal beam 5.

[0029] During assembly, first, the front section 2 of the left longitudinal beam and the front section 4 of the right longitudinal beam are separately welded to the left longitudinal beam 1 and the right longitudinal beam 5 on the tooling. Then, the left longitudinal beam 1 and the right longitudinal beam 5 are positioned based on the secondary positioning holes 12 of the left longitudinal beam, the primary positioning holes 13 of the left longitudinal beam, the primary positioning holes 10 of the right longitudinal beam, and the secondary positioning holes 11 of the right longitudinal beam. Next, the front floor cross beam 3, the rear floor cross beam 9, the front longitudinal beam connecting beam 6, the rear longitudinal beam connecting beam 8, and the intermediate connecting beam 7 are successively welded to the left longitudinal beam 1 and the right longitudinal beam 5 to complete the welding of the floor longitudinal beam layout structure. Finally, the floor longitudinal beam layout structure is also positioned based on the secondary positioning holes 12 of the left longitudinal beam, the primary positioning holes 13 of the left longitudinal beam, the primary positioning holes 10 of the right longitudinal beam, and the secondary positioning holes 11 of the right longitudinal beam to complete the welding of the floor assembly.

[0030] In the above embodiment, the left longitudinal beam 1 and the right longitudinal beam 5 are made by stamping process, and the dimensional consistency of the mounting positioning holes on them is very high. Through the precise positioning of the mounting positioning holes, the accumulation of long dimension chains during the welding process can be avoided, thereby ensuring the welding accuracy of the entire vehicle body.

[0031] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A floor longitudinal beam arrangement structure, comprising a left longitudinal beam (1), a right longitudinal beam (5), a front floor cross beam (3) and a rear floor cross beam (9), wherein the left longitudinal beam (1) and the right longitudinal beam (5) are surrounded by the front floor cross beam (3) and the rear floor cross beam (9) to form a frame structure, characterized in that: The left longitudinal beam (1) and the right longitudinal beam (5) are of equal height front to back, forming a flat support surface between the front floor cross beam (3) and the rear floor cross beam (9).

2. The floor longitudinal beam arrangement structure according to claim 1, characterized in that: The floor longitudinal beam arrangement structure further comprises a reinforcing beam structure, wherein the reinforcing beam structure is connected to the middle portions of the left longitudinal beam (1) and the right longitudinal beam (5).

3. The floor longitudinal beam arrangement structure according to claim 2, characterized in that: The reinforcing beam structure is an "H" shaped structure.

4. The floor longitudinal beam arrangement structure according to claim 2, characterized in that: The reinforcing beam structure comprises a longitudinal beam front connecting beam (6) connected between the left longitudinal beam (1) and the right longitudinal beam (5), a longitudinal beam rear connecting beam (8), and an intermediate connecting beam (7) connected between the longitudinal beam front connecting beam (6) and the longitudinal beam rear connecting beam (8).

5. The floor longitudinal beam arrangement structure according to claim 1, characterized in that: The floor longitudinal beam arrangement structure is a convex structure which is narrow at the front and wide at the rear.

6. The floor stringer arrangement structure according to claim 1, characterized in that: The front ends of the left longitudinal beam (1) and the right longitudinal beam (5) are respectively provided with a left longitudinal beam front section (2) and a right longitudinal beam front section (4) for connecting to the front floor cross beam (3).

7. The floor stringer arrangement structure according to claim 1, characterized in that: The left longitudinal beam (1) and the right longitudinal beam (5) are both provided with mounting positioning holes for cooperating with tooling during assembly.

8. The floor stringer arrangement structure according to claim 7, characterized in that: The installation positioning holes on the left longitudinal beam (1) include a left longitudinal beam secondary positioning hole (12) and a left longitudinal beam main positioning hole (13), and the installation positioning holes on the right longitudinal beam (5) include a right longitudinal beam main positioning hole (10) and a right longitudinal beam secondary positioning hole (11).

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