A body structure for a light passenger car

Abstract

The utility model relates to the technical field of car body structure, concretely is a kind of car body structure for light bus, including front wall assembly and passenger area assembly, front wall assembly includes front wall, front floor, front roof and two cylinder structures, front wall is fixedly arranged at the front end of two cylinder structures, front floor is fixedly arranged at the bottom of two cylinder structures, front wall and front floor are fixedly connected, front roof is fixedly arranged at the top of two cylinder structures;Passenger area assembly includes roof skeleton and two side wall skeletons, roof skeleton is fixedly arranged at the top of two side wall skeletons;Roof skeleton is fixedly connected with front roof, and two side wall skeletons are fixedly connected with two cylinder structures respectively.The utility model's car body structure for light bus, the components of front wall assembly all adopt high-strength sheet metal stamping part, and passenger area assembly is cage type skeleton structure, which improves the overall rigidity, strength and safety of the car body structure, while reducing the mass of the car body structure and reducing manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of vehicle body structure technology, specifically to a vehicle body structure for a light passenger vehicle. Background Technology

[0002] Existing light passenger vehicle body structures generally employ a single-frame structure or a full sheet metal stamping structure. While the traditional frame structure offers good strength, it results in a heavier body, leading to increased fuel consumption and complex, costly manufacturing processes. The full sheet metal stamping structure can reduce body weight to some extent, but due to limitations in material thickness, its overall rigidity and collision safety are insufficient, especially in frontal or side impacts, where the body is prone to deformation, compromising occupant safety. Furthermore, both of these body structures require sophisticated production equipment, resulting in high production costs and hindering flexible production and rapid iteration. Neither of the existing body structures can achieve both safety and lightweight design while reducing costs. Therefore, a new body structure for light passenger vehicles is urgently needed to address these issues. Utility Model Content

[0003] To address the technical challenge of achieving lightweighting and cost reduction in both existing frame-type and all-sheet metal stamping body structures while ensuring safety, this invention provides a body structure for light passenger vehicles. This structure combines a front bulkhead assembly with a passenger compartment assembly. All components of the front bulkhead assembly are made of high-strength sheet metal stampings, while the passenger compartment assembly features a cage-like frame structure. This design improves the overall rigidity, strength, and safety of the body structure while reducing its mass and manufacturing costs.

[0004] This utility model provides a body structure for a light passenger vehicle, including a front bulkhead assembly and a passenger area assembly fixedly disposed on the side of the front bulkhead assembly. The front bulkhead assembly includes a front bulkhead panel, a front floor, a front roof panel, and two column structures. The front bulkhead panel, front floor, front roof panel, and two column structures are all sheet metal stamping parts. The front bulkhead panel is fixedly disposed at the front end of the two column structures, the front floor is fixedly disposed at the bottom of the two column structures, the front bulkhead panel and the front floor are fixedly connected, and the front roof panel is fixedly disposed at the top of the two column structures. The passenger area assembly is a cage-like frame structure, including a roof frame and two side frames. The roof frame is fixedly disposed at the top of the two side frames. The roof frame is fixedly connected to the front roof panel, and the two side frames are respectively fixedly connected to the two column structures.

[0005] Furthermore, each of the aforementioned column structures includes a fixedly connected A-pillar and a B-pillar, forming a U-shape between the A-pillar and the B-pillar. Both the A-pillar and the B-pillar are sheet metal stamping parts. The front bulkhead is fixedly mounted at the front ends of the two A-pillars, the front floor is fixedly mounted at the bottom of the two B-pillars, and the front roof is fixedly mounted at the top of the two B-pillars. The front bulkhead, front floor, front roof, and the two A-pillars and B-pillars are welded and fixed together to ultimately form the front bulkhead assembly.

[0006] Furthermore, the front roof panel includes a main roof panel and two side roof panels. The main roof panel is fixedly mounted on the top of the two side roof panels, and the bottom of the two side roof panels is fixedly mounted on the top of the two B-pillars respectively. The main roof panel is welded and fixed to the top of the two side roof panels, and the bottom of the two side roof panels is welded and fixed to the top of the two B-pillars respectively, thus achieving the final welding of the front roof panel to the top of the two B-pillars.

[0007] Furthermore, connecting parts are fixedly provided on both sides of the roof frame, and the two connecting parts are respectively fixedly connected to the top of the two side frame frames; the roof frame is fixedly connected to the main roof plate, the two connecting parts are respectively fixedly connected to the two side roof plates, and the two side frame frames are respectively fixedly connected to the rear ends of the two B-pillars. The roof frame is welded and fixed to the two side frame frames through the two connecting parts, and the roof frame and the two side frame frames finally constitute the front assembly.

[0008] Furthermore, each of the connecting parts includes multiple arc-shaped beams, and a connecting frame is fixedly installed on the top of each of the side frame. The multiple arc-shaped beams of each connecting part are fixedly installed between the side of the top frame and the connecting frame, and the multiple arc-shaped beams are spaced apart. The leftmost arc-shaped beam in each connecting part is fixedly connected to a side top plate.

[0009] Furthermore, a first fixing piece is fixedly installed between the roof frame and the main roof plate. Multiple second fixing pieces are fixedly installed between the leftmost arc-shaped beam and the side roof plate in each connection section. Multiple third and fourth fixing pieces are fixedly installed between the rear ends of the two side frames and the two B-pillars, respectively. The roof frame and the main roof plate are welded together using the first fixing pieces. The leftmost arc-shaped beam is welded together with the side roof plate using multiple second fixing pieces. One side frame is welded together with one B-pillar using multiple third fixing pieces; the other side frame is welded together with another B-pillar using multiple fourth fixing pieces.

[0010] Compared with the prior art, the present invention has the following beneficial effects: This utility model discloses a body structure for a light passenger vehicle, which combines a front assembly and a passenger area assembly. All components of the front assembly are made of high-strength sheet metal stampings, and the passenger area assembly is a cage-like frame structure. This not only improves the overall rigidity, strength, and safety of the body structure, but also reduces the weight of the body structure and lowers manufacturing costs. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of a light passenger vehicle body structure according to the present invention; Figure 2 This is a structural schematic diagram of the passenger area assembly of this utility model; Figure 3 This is a utility model Figure 2 Enlarged structural diagram of A in the middle; The labels in the attached drawings are: 1. Front bulkhead; 2. Front floor; 3. Front roof; 31. Main roof; 32. Side roof; 4. Column structure; 41. A-pillar; 42. B-pillar; 5. Roof frame; 51. Connecting part; 511. Curved beam; 6. Side frame; 61. Connecting frame; 62. Third fixing piece; 63. Fourth fixing piece; 7. First fixing piece; 8. Second fixing piece. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] like Figures 1-3 As shown, a light passenger vehicle body structure includes a front bulkhead assembly and a passenger area assembly fixedly disposed on the side of the front bulkhead assembly. The front bulkhead assembly includes a front bulkhead panel 1, a front floor 2, a front roof panel 3, and two column structures 4. The front bulkhead panel 1, front floor 2, front roof panel 3, and two column structures 4 are all sheet metal stamping parts. The front bulkhead panel 1 is fixedly disposed at the front end of the two column structures 4, the front floor 2 is fixedly disposed at the bottom of the two column structures 4, the front bulkhead panel 1 and the front floor 2 are fixedly connected, and the front roof panel 3 is fixedly disposed at the top of the two column structures 4. The passenger area assembly is a cage-like frame structure, including a roof frame 5 and two side frames 6. The roof frame 5 and the two side frames 6 extend along the length direction of the vehicle body structure. The roof frame 5 is fixedly disposed at the top of the two side frames 6, and the two side frames 6 are symmetrical. The roof frame 5 is fixedly connected to the front roof panel 3, and the two side frames 6 are respectively fixedly connected to the two column structures 4.

[0014] The front bulkhead 1 is welded and fixed to the front end of the two pillar structures 4, the front floor 2 is welded and fixed to the bottom of the two pillar structures 4, the front bulkhead 1 and the front floor 2 are also welded and fixed, and the front roof 3 is welded and fixed to the top of the two pillar structures 4. The front bulkhead 1, front floor 2, front roof 3 and the two pillar structures 4 are welded and fixed to finally form the front bulkhead assembly. The front bulkhead 1, front floor 2, front roof 3 and the two pillar structures 4 are all sheet metal stamping parts to reduce the weight of the driver's area of ​​the light passenger vehicle and improve the front collision energy absorption capacity of the vehicle body. All components of the front bulkhead assembly use high-strength sheet metal stamping parts, which significantly enhances the front rigidity and collision energy absorption capacity (i.e., safety) of the vehicle body structure; at the same time, it effectively reduces the weight of the vehicle body structure (mainly reducing the weight of the front of the low body structure and the driver's area), improving the overall vehicle economy. The design of the front bulkhead assembly reduces the weight of the vehicle body structure and improves the strength and safety of the vehicle body structure.

[0015] The roof frame 5 is welded and fixed to the top of the two side frame frames 6. The roof frame 5 and the two side frame frames 6 are welded and fixed together to form the front assembly. The passenger area assembly is a cage-like frame structure. In this embodiment, the roof frame 5 and the two side frame frames 6 are welded from several lightweight steel pipes or rectangular steel pipes (aluminum alloy pipes can also be used), which reduces the weight of the vehicle body structure and improves its strength. The roof frame 5 and the two side frame frames 6 are used to support the roof and sides of the light passenger vehicle, enhancing the body strength. The passenger area assembly has high torsional stiffness, effectively protecting the safety of passengers.

[0016] The roof frame 5 is fixedly connected to the front roof plate 3, and the two side frame frames 6 are fixedly connected to the two column structures 4 respectively. Finally, the passenger area assembly and the front assembly are welded and fixed. The front assembly and the passenger area assembly are efficiently connected, while ensuring that the body structure absorbs energy reasonably and is not easily torn during a collision.

[0017] In this embodiment, when the vehicle body structure is subjected to a collision, the front bulkhead assembly absorbs energy first, and the passenger compartment assembly, even after deformation, still protects the occupants' survival space. The front bulkhead assembly and the passenger compartment assembly are ultimately connected as a single unit, ensuring the rigidity, strength, and safety of the light passenger vehicle's body structure.

[0018] The components of the front bulkhead assembly and the passenger area assembly can be produced modularly, allowing for flexible manufacturing processes. Existing stamping production lines can be used to produce the components of the front bulkhead assembly, while the roof frame 5 and two side frames 6 of the passenger area assembly can be quickly welded and assembled, improving manufacturing efficiency and reducing costs. Compared to the previous body structure using a single frame structure or a full sheet metal stamping structure, manufacturing costs are significantly reduced.

[0019] The light passenger vehicle body structure of this embodiment combines a front bulkhead assembly and a passenger area assembly. All components of the front bulkhead assembly are made of high-strength sheet metal stampings, and the passenger area assembly is a cage-like frame structure. This not only improves the overall rigidity, strength and safety of the body structure, but also reduces the mass of the body structure and lowers manufacturing costs.

[0020] Among them, the existing light passenger vehicles are limited by a single frame structure, which makes it impossible to realize many complex shapes in engineering. The body structure of this embodiment can achieve a variety of front assembly shapes by replacing the front part with sheet metal stamping parts, thus improving the plasticity of the shape.

[0021] In one possible implementation, each column structure 4 includes a welded and fixedly connected A-column 41 and B-column 42, forming a U-shape between them. Both A-column 41 and B-column 42 are sheet metal stamping parts. The front bulkhead 1 is fixedly disposed at the front end of the two A-column 41s, the front floor 2 is fixedly disposed at the bottom of the two B-column 42s, and the front top plate 3 is fixedly disposed at the top of the two B-column 42s. The front bulkhead 1 is welded and fixed to the front end of the two A-column 41s, the front floor 2 is welded and fixed to the bottom of the two B-column 42s, the front bulkhead 1 and the front floor 2 are also welded and fixed, and the front top plate 3 is welded and fixed to the top of the two B-column 42s. The front bulkhead 1, front floor 2, front top plate 3, and the two A-column 41s and B-column 42 are welded and fixed to ultimately form the front bulkhead assembly. The front bulkhead 1, front floor 2, front top plate 3, and the two A-column 41s and B-column 42 are made of high-strength steel sheet, preferably hot-formed high-strength steel sheet, to ensure strength while minimizing sheet thickness. Among them, the front bulkhead 1, the front floor 2 and the two A-pillars 41 form a rigid structure to support the instrument panel and the front suspension; the front roof 3, the two A-pillars 41 and the two B-pillars 42 form a doorway and a front windshield opening.

[0022] In one possible implementation, the front roof panel 3 includes a main roof panel 31 and two side roof panels 32. The main roof panel 31 is fixedly mounted on the top of the two side roof panels, and the bottom of the two side roof panels is fixedly mounted on the top of the two B-pillars 42, respectively. The main roof panel 31 is welded and fixed to the top of the two side roof panels, and the bottom of the two side roof panels is welded and fixed to the top of the two B-pillars 42, thus achieving the front roof panel 3 being welded to the top of the two B-pillars 42.

[0023] In one possible implementation, connecting portions 51 are fixedly provided on both sides of the roof frame 5, and the two connecting portions 51 are respectively fixedly connected to the top of the two side frame frames 6; the roof frame 5 is fixedly connected to the main roof plate 31, the two connecting portions 51 are respectively fixedly connected to the two side roof plates 32, and the two side frame frames 6 are respectively fixedly connected to the rear ends of the two B-pillars 42. The roof frame 5 is welded and fixed to the two side frame frames 6 through the two connecting portions 51, and the roof frame 5 and the two side frame frames 6 finally constitute the front assembly. The roof frame 5 is welded and fixed to the main roof plate 31, the two connecting portions 51 are welded and fixed to the two side roof plates 32, and the two side frame frames 6 are welded and fixed to the rear ends of the two B-pillars 42, and finally the passenger area assembly is welded and fixed to the front assembly. In this embodiment, the longitudinal beams on the roof frame 5 and the two side frame frames 6 correspond to each other to form a closed-loop spatial frame.

[0024] In one possible implementation, each connecting part 51 includes multiple arc-shaped beams 511, and a connecting frame 61 is fixedly installed on the top of each side frame 6. The multiple arc-shaped beams 511 of each connecting part 51 are fixedly installed between the side of the top cover frame 5 and the connecting frame 61, with the multiple arc-shaped beams 511 spaced apart. The leftmost arc-shaped beam 511 of each connecting part 51 is fixedly connected to a side top plate 32. One side of the side frame 6 is welded and fixed to the connecting frame 61 on the top of one side frame 6 via multiple arc-shaped beams 511, and the other side of the side frame 6 is welded and fixed to the connecting frame 61 on the top of another side frame 6 via multiple arc-shaped beams 511. Finally, the top cover frame 5 is welded and fixed to the top of the two side frames 6.

[0025] The roof frame 5 is welded and fixed to the main roof plate 31. The two leftmost arc beams 511 are welded and fixed to the two side roof plates 32 respectively. The two side frame frames 6 are welded and fixed to the rear ends of the two B pillars 42 respectively. Finally, the passenger area assembly is welded and fixed to the front assembly to ensure the overall rigidity of the body structure and reasonable energy absorption during collision, making the whole structure less prone to tearing.

[0026] In one possible implementation, a first fixing piece 7 is fixedly disposed between the top cover frame 5 and the main top plate 31. Multiple second fixing pieces 8 are fixedly disposed between the leftmost arc-shaped beam 511 and the side top plate 32 in each of the connecting parts 51. Multiple third fixing pieces 62 and fourth fixing pieces 63 are fixedly disposed between the rear ends of the two side frame frames 6 and the two B-pillars 42, respectively. There is one first fixing piece 7, the length of which is less than the length of the top cover frame 5 and less than the length of the main top plate 31. The top cover frame 5 and the main top plate 31 are welded together using the first fixing piece 7. The leftmost arc-shaped beam 511 is welded together with the side top plate 32 using multiple second fixing pieces 8. One side frame 6 is welded together with one B-pillar 42 using multiple third fixing pieces 62; the other side frame 6 is welded together with another B-pillar 42 using multiple fourth fixing pieces 63.

[0027] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A body structure for a light passenger vehicle, characterized in that, The system includes a front bulkhead assembly and a passenger area assembly fixedly disposed on the side of the front bulkhead assembly. The front bulkhead assembly includes a front bulkhead panel (1), a front floor (2), a front roof panel (3), and two column structures (4). The front bulkhead panel (1), the front floor (2), the front roof panel (3), and the two column structures (4) are all sheet metal stamping parts. The front bulkhead panel (1) is fixedly disposed at the front end of the two column structures (4), the front floor (2) is fixedly disposed at the bottom of the two column structures (4), the front bulkhead panel (1) and the front floor (2) are fixedly connected, and the front roof panel (3) is fixedly disposed at the top of the two column structures (4). The passenger area assembly is a cage-like frame structure. The passenger area assembly includes a roof frame (5) and two side frame frames (6). The roof frame (5) is fixedly disposed at the top of the two side frame frames (6). The roof frame (5) is fixedly connected to the front roof panel (3), and the two side frame frames (6) are respectively fixedly connected to the two column structures (4).

2. The light passenger vehicle body structure according to claim 1, characterized in that, Each of the column structures (4) includes a fixedly connected A column (41) and B column (42) forming a U-shape between them. The A column (41) and B column (42) are both sheet metal stamping parts. The front panel (1) is fixedly installed at the front end of the two A columns (41), the front floor (2) is fixedly installed at the bottom of the two B columns (42), and the front top panel (3) is fixedly installed at the top of the two B columns (42).

3. The light passenger vehicle body structure according to claim 2, characterized in that, The front roof panel (3) includes a main roof panel (31) and two side roof panels (32). The main roof panel (31) is fixedly installed on the top of the two side roof panels, and the bottom of the two side roof panels is fixedly installed on the top of the two B-pillars (42).

4. The light passenger vehicle body structure according to claim 3, characterized in that, The top cover frame (5) is fixedly provided with connecting parts (51) on both sides. The two connecting parts (51) are fixedly connected to the top of the two side frame frames (6) respectively. The top cover frame (5) is fixedly connected to the main top plate (31). The two connecting parts (51) are fixedly connected to the two side top plates (32) respectively. The two side frame frames (6) are fixedly connected to the rear end of the two B pillars (42) respectively.

5. The light passenger vehicle body structure according to claim 4, characterized in that, Each of the connecting parts (51) includes multiple arc beams (511), and each of the side frame frames (6) is fixedly provided with a connecting frame (61) at its top. The multiple arc beams (511) of each connecting part (51) are fixedly provided between the side of the top cover frame (5) and the connecting frame (61), and the multiple arc beams (511) are spaced apart. The leftmost arc beam (511) in each connecting part (51) is fixedly connected to a side top plate (32).

6. The body structure for a light passenger vehicle according to claim 5, characterized in that, A first fixing piece (7) is fixed between the top cover frame (5) and the main top plate (31). Multiple second fixing pieces (8) are fixed between the leftmost arc beam (511) of each connection part (51) and the side top plate (32). Multiple third fixing pieces (62) and fourth fixing pieces (63) are fixed between the rear ends of the two side frame frames (6) and the two B-pillars (42).

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