Rear wall structure with top pressure resisting function

Abstract

The utility model provides a rear wall structure with a top pressure resisting function, which comprises a rear wall outer plate, a rear wall cross beam is fixedly connected to the inner side of the rear wall outer plate, a plurality of rear wall upper connecting beams are connected to the upper part of the rear wall cross beam, a rear wall middle left longitudinal beam and a rear wall middle right longitudinal beam are connected to the lower part of the rear wall cross beam, and the rear wall middle left longitudinal beam and the rear wall middle right longitudinal beam are connected to the lower part of the rear wall cross beam. The rear wall upper connecting beam is provided with an inward-concave crushing notch. When the pressure on the top of the cab exceeds a threshold value, the rear wall upper connecting beam is crushed at the crushing gap and is used for absorbing the impact force on the top of the cab; and meanwhile, the crushing direction of the whole rear wall upper welding assembly can be guided, so that a certain safe living space can be reserved for a driver in a cab.

Description

Technical Field

[0001] The utility model belongs to the technical field of commercial vehicle body-in-white, and particularly relates to a rear wall structure with an anti-top-pressure function. Background Art

[0002] As an occupant protection cabin, the structure of a commercial vehicle cab must meet the cab top strength requirements in the mandatory national regulation GB 26512-2011 "Occupant Protection of Commercial Vehicle Cabs". Most importantly, when the cab bears the top pressure, it can play a role in protecting the personal safety of the occupants. At present, the rear wall assembly of the cab lacks an energy-absorbing structure. When the cab is under the top pressure, it can only bear the pressure through its own strength. Because there is not enough energy-absorbing space, the survival space of the driver and passengers cannot be guaranteed when the cab structure is crushed. Content of the Utility Model

[0003] To solve the above problems in the prior art, the utility model provides a rear wall structure with an anti-top-pressure function, including a rear wall outer panel. A rear wall cross beam is fixedly connected to the inner side of the rear wall outer panel. A plurality of upper rear wall connecting beams are connected above the rear wall cross beam. A left middle rear wall longitudinal beam and a right middle rear wall longitudinal beam are connected below the rear wall cross beam. A crush notch concave inward is provided on the upper rear wall connecting beam.

[0004] Further, a reinforcing plate is provided between the bottom of the upper rear wall connecting beam and the rear wall cross beam.

[0005] Further, the rear wall outer panel includes an upper rear wall outer panel and a lower rear wall outer panel. The upper rear wall outer panel is fixed on the outer sides of the upper rear wall connecting beam and the rear wall cross beam. The lower rear wall outer panel is fixedly connected to the outer sides of the left middle rear wall longitudinal beam and the right middle rear wall longitudinal beam.

[0006] Further, the crush notch is "V"-shaped or inverted trapezoidal.

[0007] Further, the upper rear wall connecting beam is perpendicular to the rear wall cross beam.

[0008] Further, the number of the upper rear wall connecting beams is [number], and they are evenly arranged above the rear wall cross beam.

[0009] Compared with the prior art, the utility model mainly has the following advantages:

[0010] 1. An inwardly concave crush notch is provided on the upper connecting beam of the rear enclosure of the utility model. When the pressure on the top of the cab exceeds a threshold, the upper connecting beam of the rear enclosure is crushed at the crush notch to absorb the impact force on the top of the cab; at the same time, it can also guide the crushing direction of the entire upper welding assembly of the rear enclosure, thereby leaving a certain safe living space for the driver in the cab.

[0011] 2. The reinforcing plate of the utility model enhances the strength and rigidity of the structure, and can disperse the concentrated force to a larger area, thereby reducing local stress and effectively preventing stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the rear enclosure structure with anti-top pressure function of the utility model;

[0013] Figure 2 yes Figure 1 A partial schematic diagram of the AA section view;

[0014] In the figure: 1. Right longitudinal beam in the middle of the rear enclosure; 2. Upper outer plate of the rear enclosure; 3. Upper connecting beam of the rear enclosure; 4. Upper welding assembly of the rear enclosure; 5. Rear enclosure cross beam; 6. Left longitudinal beam in the middle of the rear enclosure; 7. Rear enclosure outer plate; 8. Lower welding assembly of the rear enclosure; 9. Crush notch; 10. Reinforcement plate. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0016] like Figure 1 , Figure 2 As shown, a rear enclosure structure with a top pressure resistance function includes a rear enclosure outer plate, a rear enclosure cross beam 5 is fixedly connected to the inner side of the rear enclosure outer plate, and a plurality of rear enclosure upper connecting beams 3 are connected above the rear enclosure cross beam 5. A rear enclosure middle left longitudinal beam 1 and a rear enclosure middle right longitudinal beam 6 are connected below the rear enclosure cross beam 5. The rear enclosure middle left longitudinal beam 1 and the rear enclosure middle right longitudinal beam 6 are arranged in a vertical direction and are perpendicular to the rear enclosure cross beam 5. The tops of the rear enclosure middle left longitudinal beam 1 and the rear enclosure middle right longitudinal beam 6 are connected to the rear enclosure cross beam 5 by welding, and one side of the rear enclosure middle left longitudinal beam 1 and the rear enclosure middle right longitudinal beam 6 are connected to the inner side of the rear enclosure outer plate by welding. The rear enclosure upper connecting beam 3 is arranged in a vertical direction and is perpendicular to the rear enclosure cross beam 5. The bottom of the rear enclosure upper connecting beam 3 is connected to the rear enclosure cross beam 5 by welding, and one side of the rear enclosure upper connecting beam 3 is connected to the inner side of the rear enclosure outer plate by welding.

[0017] Preferably, the upper rear enclosure connecting beam 3 is provided with a stamping-formed inwardly concave crushing notch 9. Preferably, the crushing notch 9 is "V"-shaped or inverted trapezoidal. When the pressure on the cab from the top exceeds a threshold value, the load borne by the crushing notch 9 of the upper rear enclosure connecting beam 3 exceeds its bearing range, and the crushing notch 9 of the upper rear enclosure connecting beam 3 is crushed to absorb the impact force on the top of the cab. At the same time, it can also play a guiding role in the crushing direction of the entire rear enclosure structure, ensuring that the rear enclosure structure is crushed in a predetermined direction when impacted, so as to leave a certain safe living space for the driver in the cab.

[0018] In some embodiments, the rear enclosure outer panel includes an upper rear enclosure outer panel 2 and a lower rear enclosure outer panel 7. The upper rear enclosure outer panel 2 is welded and fixed to the outside of the upper rear enclosure connecting beam 3 and the rear enclosure cross beam 5. The upper rear enclosure outer panel 2, the upper rear enclosure connecting beam 3 and the rear enclosure cross beam 5 are welded together to form an upper rear enclosure welding assembly 4. The lower rear enclosure outer panel 7 is fixedly connected to the outside of the left middle rear enclosure longitudinal beam 1 and the right middle rear enclosure longitudinal beam 6. The lower rear enclosure outer panel 7, the left middle rear enclosure longitudinal beam 1 and the right middle rear enclosure longitudinal beam 6 are welded together to form a lower rear enclosure welding assembly 8.

[0019] In some embodiments, a reinforcing plate 10 is provided between the bottom of the upper rear enclosure connecting beam 3 and the rear enclosure cross beam 5 to prevent the rear enclosure cross beam 5 from being crushed by the pressure on the cab from the top through the bottom of the upper rear enclosure connecting beam 3. Thus, it guides the pressure on the cab from the top to pass through the upper rear enclosure connecting beam 3 to the reinforcing plate 10, and is dispersed to the entire rear enclosure cross beam 5 through the reinforcing plate 10, and then the force is dispersed downward through the left middle rear enclosure longitudinal beam 1 and the right middle rear enclosure longitudinal beam 6 through the rear enclosure cross beam 5. The reinforcing plate 10 enhances the strength and stiffness of the structure, and at the same time can disperse the concentrated force to a larger area, thereby reducing the local stress and effectively preventing stress concentration. The left middle rear enclosure longitudinal beam 1 and the right middle rear enclosure longitudinal beam 6 can effectively transfer the force to the vehicle bottom or other supporting structures, thus completing the entire process of force transfer and dispersion.

[0020] In some embodiments, the number of the upper rear enclosure connecting beams 3 is 3, and they are evenly spaced above the rear enclosure cross beam 5. A stable support structure is formed above the rear enclosure cross beam 5. The overall strength and stiffness of the rear enclosure structure are enhanced, and the overall compressive capacity of the vehicle is improved. And because they are evenly spaced, it can ensure that the impact force is evenly transmitted and dispersed in multiple directions, and further enhances the guiding effect of the crushing notch 9.

[0021] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A rear enclosure structure with anti-top pressure function, characterized in that: The invention comprises a rear enclosure outer plate, wherein a rear enclosure cross beam (5) is fixedly connected to the inner side of the rear enclosure outer plate, a plurality of rear enclosure upper connecting beams (3) are connected to the upper side of the rear enclosure cross beam (5), a rear enclosure middle left longitudinal beam (1) and a rear enclosure middle right longitudinal beam (6) are connected to the lower side of the rear enclosure cross beam (5), and an inwardly concave crushing notch (9) is provided on the rear enclosure upper connecting beam (3).

2. The rear enclosure structure with anti-top pressure function according to claim 1, characterized in that: A reinforcing plate (10) is provided between the bottom of the rear enclosure upper connecting beam (3) and the rear enclosure cross beam (5).

3. The rear enclosure structure with anti-top pressure function according to claim 1, characterized in that: The rear enclosure outer panel comprises an upper rear enclosure outer panel (2) and a lower rear enclosure outer panel (7), wherein the upper rear enclosure outer panel (2) is fixed to the outer sides of the upper rear enclosure connecting beam (3) and the rear enclosure cross beam (5), and the lower rear enclosure outer panel is fixedly connected to the outer sides of the left longitudinal beam (1) in the middle of the rear enclosure and the right longitudinal beam (6) in the middle of the rear enclosure.

4. The rear enclosure structure with anti-top pressure function according to claim 1, characterized in that: The crushing notch (9) is in a "V" shape or an inverted trapezoidal shape.

5. The rear enclosure structure with anti-top pressure function according to claim 1, characterized in that: The rear enclosure upper connecting beam (3) is perpendicular to the rear enclosure cross beam (5).

6. The rear enclosure structure with anti-top pressure function according to claim 5, characterized in that: The number of the rear enclosure upper connection beams (3) is three, and they are evenly spaced and arranged above the rear enclosure cross beam (5).

Images