Method for manufacturing lower body structure of light passenger vehicle body-in-white

Abstract

The present invention discloses a method for manufacturing a light bus body-in-white lower body structure, comprising the following steps: S01: preparing a cabin floor assembly and a rear frame assembly according to a mold; S02: preparing a front panel assembly according to a chassis suspension configuration; S03: preparing a front longitudinal beam assembly according to the chassis suspension configuration; S04: welding the cabin floor assembly and the front panel assembly to form the upper portion of the body-in-white lower body structure; and welding the rear frame assembly and the front longitudinal beam assembly to form the lower portion of the body-in-white lower body structure. By adopting the technical solution of the present invention, when the chassis suspension of a light bus is switched, the corresponding body-in-white lower body structure does not need to be completely switched. Instead, only the front panel assembly and the front longitudinal beam assembly need to be newly prepared according to the chassis suspension configuration, while the original cabin floor assembly and rear frame assembly can be retained and prepared. This allows for rapid completion of a complete switch of the body-in-white lower body structure, saving significant time and manufacturing costs while also enabling rapid adaptation to diverse usage scenarios and functions.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile manufacturing, and in particular relates to a method for manufacturing a lower body structure of a light passenger vehicle body-in-white. Background Art

[0002] In the era of rapid development of automobiles, the speed of automobile development, replacement and updating is getting faster and faster. The diversification of usage scenarios and functions in the light bus market segment is also a development trend, and the requirements for the diversification of light bus configurations are also getting higher and higher. Due to the trend of diversification of light bus usage scenarios and functions, it becomes very important to configure light buses with different chassis configurations.

[0003] Currently, most light buses utilize a monocoque structure, where each chassis and suspension are assembled and fixed to a specific underbody structure. Therefore, switching chassis and suspension configurations often requires a complete change in the underbody structure of the body-in-white. This incurs long design and manufacturing cycles and high manufacturing costs. This manufacturing approach hinders the diversification of light buses' usage scenarios and functions, making it difficult to rapidly upgrade vehicles. Summary of the Invention

[0004] The present invention provides a method for manufacturing the lower body structure of a light passenger vehicle body-in-white, which overcomes the shortcomings of the background art and adopts the following technical solutions:

[0005] A method for manufacturing a light passenger vehicle body-in-white lower body structure comprises the following steps: S01: preparing a vehicle compartment floor assembly and a rear frame assembly according to a mold; S02: preparing a front panel assembly according to a chassis suspension configuration; S03: preparing a front longitudinal beam assembly according to the chassis suspension configuration; S04: welding the vehicle compartment floor assembly and the front panel assembly to form an upper portion of the body-in-white lower body structure; welding the rear frame assembly and the front longitudinal beam assembly to form a lower portion of the body-in-white lower body structure; S05: welding the upper portion of the body-in-white lower body structure to the lower portion of the body-in-white lower body structure to assemble and form the body-in-white lower body structure; the above steps S01 to S03 are performed in no specified order.

[0006] Preferably, S021a: prepare a wheel cover assembly according to the chassis suspension configuration; S022a: prepare a front bulkhead upper cover and a front enclosure middle plate according to a mold; S023a: fix the wheel cover assembly to the front enclosure middle plate, and fix the front bulkhead upper cover to the front enclosure middle plate to assemble a front enclosure assembly.

[0007] Preferably, S021b: prepare a wheel cover assembly according to the chassis suspension configuration; S022b: prepare a front bulkhead upper cover and a front enclosure middle plate according to a mold, and perform trimming and shaping on the front enclosure middle plate; S023b: fix the wheel cover assembly to the front enclosure middle plate, and fix the front bulkhead upper cover to the front enclosure middle plate and the wheel cover assembly to assemble a front enclosure assembly.

[0008] Preferably, S031: prepare a front longitudinal beam base beam according to a mold; S032: prepare a wheel extension beam according to a chassis suspension; S033: fix the wheel extension beam to the front longitudinal beam base beam to assemble a front longitudinal beam assembly.

[0009] Preferably, S051: prepare a front anti-collision beam assembly according to a mold; S052: weld the upper part of the body-in-white lower body structure to the lower part of the body-in-white lower body structure, and then fix it with the front anti-collision beam assembly to assemble to form the entire body-in-white lower body structure assembly.

[0010] Preferably, the front anti-collision beam assembly includes a front anti-collision beam and an energy absorption box, and the energy absorption box is fixed to the front anti-collision beam.

[0011] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) By adopting the technical solution of the present invention, it is only necessary to prepare the front panel assembly and the front longitudinal beam assembly according to the chassis suspension configuration, and then weld the front panel assembly and the front longitudinal beam assembly to the prepared car floor assembly and rear frame assembly respectively to form the upper and lower parts of the body-in-white lower body structure, and finally weld the upper part of the body-in-white lower body structure to the lower part of the body-in-white lower body structure to assemble a complete body-in-white lower body structure; therefore, when switching the chassis suspension of a light passenger car, its corresponding body-in-white lower body structure does not need to be completely switched again, and it is only necessary to re-prepare the front panel assembly and the front longitudinal beam assembly according to the chassis suspension configuration, while the original car floor assembly and rear frame assembly can be retained and prepared, so that the new switch of the body-in-white lower body structure can be quickly completed, which not only saves a lot of time and preparation costs, but also can quickly adapt to the diversification of usage scenarios and usage functions, and accelerate the realization of automobile upgrades.

[0013] (2) When preparing the front panel assembly, the wheel cover assembly and the front bulkhead upper cover are respectively fixed to the front panel middle plate, and the complete front panel assembly can be assembled; the front bulkhead upper cover and the front panel middle plate do not need to be designed separately, and the preparation work can be carried out with the original mold, and only the wheel cover assembly needs to be re-prepared with a mold designed separately according to the chassis suspension, which further saves a lot of time and design costs.

[0014] (3) When preparing the front longitudinal beam assembly, the wheel extension beam is fixed to the front longitudinal beam base beam to assemble the complete front longitudinal beam assembly; the front longitudinal beam base beam does not need to be designed separately and can be prepared with the original mold. Only the wheel extension beam needs to be re-prepared with a mold designed separately according to the chassis suspension, which further saves a lot of time and design costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic structural diagram of a lower body structure assembly of a body-in-white according to a first embodiment of the present invention;

[0017] Figure 2 for Figure 1 Exploded diagram;

[0018] Figure 3 This is a schematic diagram of the assembly of a front longitudinal beam assembly according to a first embodiment of the present invention;

[0019] Figure 4 This is a schematic structural diagram of a front panel assembly according to a first embodiment of the present invention;

[0020] Figure 5 Figure 4 Exploded diagram;

[0021] Figure 6 This is a schematic structural diagram of the lower body structure assembly of the body-in-white according to the second embodiment of the present invention;

[0022] Figure 7 for Figure 6 Exploded diagram;

[0023] Figure 8 This is a schematic diagram of the assembly of the front longitudinal beam assembly according to the second embodiment of the present invention;

[0024] Figure 9 This is a schematic structural diagram of a front panel assembly according to a second embodiment of the present invention;

[0025] Figure 10 Figure 9 Exploded diagram;

[0026] Figure 11 This is a schematic diagram of the assembly of the front anti-collision beam assembly.

[0027] The accompanying drawings are explained as follows: 1. Carriage floor assembly; 2. Rear frame assembly; 3a. Front panel assembly; 31a. Front bulkhead upper cover; 32a. Front panel middle plate; 33a. Left front wheel cover; 34a. Right front wheel cover; 3b. Front panel assembly; 31b. Front bulkhead upper cover; 32b. Front panel middle plate; 33b. Left front wheel cover; 34b. Right front wheel cover; 4a. Front longitudinal beam assembly; 41a. Front longitudinal beam base beam; 42a. Wheel cover extension beam; 4b. Front longitudinal beam assembly; 42b. Wheel cover extension beam; 5. Front anti-collision beam assembly; 51. Front anti-collision beam; 52. Energy absorption box. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the claims, description and drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is for the purpose of distinguishing different objects rather than for describing a specific order.

[0030] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise expressly defined, directional words such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention.

[0031] In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0032] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0033] See Figures 1 to 11 .

[0034] This embodiment provides a method for manufacturing the lower body structure of a light passenger vehicle body in white. In the first embodiment, see Figures 1 to 5 , is a body-in-white lower body structure assembly manufactured according to chassis suspension A, which is welded by a car floor assembly 1, a rear frame assembly 2, a front panel assembly 3a, a front longitudinal beam assembly 4a and a front anti-collision beam assembly 5; among which the car floor assembly 1, the rear frame assembly 2 and the front anti-collision beam assembly 5 are prepared by existing molds, and no additional molds need to be designed; while the front panel assembly 3a and the front longitudinal beam assembly 4a need to be prepared by additionally designed molds according to chassis suspension A.

[0035] In this embodiment, see Figure 4 and Figure 5 The front panel assembly 3a is welded together by the left front wheel cover 33a, the right front wheel cover 34a, the front bulkhead upper cover 31a and the front panel middle plate 32a; in order to further save time and design costs, the front bulkhead upper cover 31a and the front panel middle plate 32a can be prepared by existing molds, while the left front wheel cover 33a and the right front wheel cover 34a need to be prepared by separately designed molds according to the chassis suspension A, so that when the front bulkhead upper cover 31a and the front panel middle plate 32a are welded together with the left front wheel cover 33a and the right front wheel cover 34a, the front panel assembly 3a can be just adapted to the chassis suspension A through the left front wheel cover 33a and the right front wheel cover 34a.

[0036] In this embodiment, see Figure 4 When the front panel assembly 3a is assembled and welded, the left front wheel cover 33a is first welded to the arc edge of the lower left corner of the front panel middle plate 32a, and the right front wheel cover 34a is welded to the arc edge of the lower right corner of the front panel middle plate 32a; then the front bulkhead upper cover 31a is welded to the upper side of the front panel middle plate 32a to assemble and weld the front panel assembly 3a.

[0037] In this embodiment, see Figure 3 The front longitudinal beam assembly 4a is welded together by the front longitudinal beam base beam 41a and the wheel bag extension beam 42a; in order to further save time and design costs, the front longitudinal beam base beam 41a can be prepared by an existing mold, while the wheel bag extension beam 42a needs to be prepared by separately designing a mold according to the chassis suspension A, so that when the front longitudinal beam base beam 41a and the wheel bag extension beam 42a are welded together, the front longitudinal beam assembly 4a can be adapted to the chassis suspension A through the wheel bag extension beam 42a.

[0038] In this embodiment, the front longitudinal beam assembly 4a has two groups of wheel extension beams 42a and front longitudinal beam base beams 41a; when the front longitudinal beam assembly 4a is assembled and welded, the wheel extension beams 42a are first sleeved on the front longitudinal beam base beam 41a, and then the wheel extension beams 42a and the front longitudinal beam base beam 41a are welded into one.

[0039] In this embodiment, the front panel assembly 3a is welded to the front end of the vehicle floor assembly 1 through the rear end of the front panel middle plate 32a to form the upper part of the vehicle body-in-white lower body structure; the front longitudinal beam assembly 4a is welded to the front end of the rear frame assembly 2 through the rear end of the front longitudinal beam base beam 41a to form the lower part of the vehicle body-in-white lower body structure; when the upper part of the vehicle body-in-white lower body structure is welded to the lower part, the left wheel bag extension beam 42a is welded to the left front wheel cover 33a and the front panel middle plate 32a, and the right wheel bag extension beam 42a is welded to the right front wheel cover 34a and the front panel middle plate 32a, and the left and right front longitudinal beam base beams 41a are also welded to the lower end of the vehicle floor assembly 1 and the front end of the rear frame assembly 2, respectively, so that the upper part is welded to the lower part to form a complete vehicle body-in-white lower body structure.

[0040] In this embodiment, see Figure 11 The front anti-collision beam assembly 5 includes a front anti-collision beam 51 and an energy absorption box 52 . Two energy absorption boxes 52 are provided, which are fixedly installed at both ends of the front anti-collision beam 51 respectively.

[0041] In this embodiment, see Figure 3 , the front end of the wheel extension beam 42a prepared according to the chassis suspension A is a planar structure; and the traditional wheel extension beam 42a usually sets a crush structure at the front end of the wheel extension beam 42a, so that when the front anti-collision beam assembly 5 is fixedly installed on the wheel extension beam 42a, the crush function can be realized by the wheel extension beam 42a; but in order to reduce the design and manufacturing costs, the crush structure on the wheel extension beam 42a is cancelled, and only the wheel extension beam 42a adapted to the chassis suspension A needs to be prepared; the front anti-collision beam assembly 5 is welded to the front end planar structure of the wheel extension beam 42a through two energy absorption boxes 52, and can be assembled into a complete white body lower body structure assembly, and the crush function of the wheel extension beam 42a is realized by the energy absorption box 52.

[0042] In Example 2, see Figures 6 to 10 The manufacturing method is the same as that of the first embodiment, but in order to better adapt to different chassis suspensions B, a different preparation method is adopted for the front center plate 32b.

[0043] In this embodiment, see Figure 6 , is a body-in-white lower body structure assembly manufactured according to the chassis suspension B, which is welded by a car floor assembly 1, a rear frame assembly 2, a front panel assembly 3b, a front longitudinal beam assembly 4b and a front anti-collision beam assembly 5; wherein the car floor assembly 1, the rear frame assembly 2 and the front anti-collision beam assembly 5 are prepared by existing molds, and no additional molds need to be designed. The structure of the car floor assembly 1, the rear frame assembly 2 and the front anti-collision beam assembly 5 is the same as that of the car floor assembly 1, the rear frame assembly 2 and the front anti-collision beam assembly 5 in Example 1, and will not be discussed again; however, the front panel assembly 3b and the front longitudinal beam assembly 4b need to be prepared by additionally designed molds according to the chassis suspension B.

[0044] In this embodiment, see Figure 9 and Figure 10 The front panel assembly 3b is welded by the left front wheel cover 33b, the right front wheel cover 34b, the front bulkhead cover 31b and the front panel middle panel 32b; in order to further save time and design costs, the front bulkhead cover 31b and the front panel middle panel 32b are prepared by existing molds, and the two sides of the front panel middle panel 32b need to be trimmed and shaped, such as Figure 10 The front center panel 32b shown in the figure; and the left front wheel cover 33b and the right front wheel cover 34b need to be prepared by separately designed molds according to the chassis suspension B, so that when the front bulkhead upper cover 31b and the front center panel 32b are welded into one with the left front wheel cover 33b and the right front wheel cover 34b, the front assembly 3b can be just adapted to the chassis suspension B through the left front wheel cover 33b and the right front wheel cover 34b.

[0045] In this embodiment, see Figure 9 When the front panel assembly 3b is assembled and welded, the left front wheel cover 33b is completely welded to the left side of the front panel middle plate 32b, and the right front wheel cover 34b is completely welded to the right side of the front panel middle plate 32b; then the front bulkhead upper cover 31b is welded to the upper side of the front panel middle plate 32b, the left front wheel cover 33b and the right front wheel cover 34b to assemble and weld the front panel assembly 3b that is adapted to the chassis suspension B.

[0046] In this embodiment, see Figure 8 The front longitudinal beam assembly 4b is welded by the front longitudinal beam base beam 41a and the wheel bag extension beam 42b. Its manufacturing method and installation and fixing method are the same as those in Example 1 and will not be discussed again.

[0047] The above description and embodiments are intended to explain the scope of protection of the present invention, but do not constitute a limitation thereto. Modifications, equivalent substitutions, or other improvements to the embodiments of the present invention or portions thereof that can be obtained by a person of ordinary skill in the art through logical analysis, reasoning, or limited experimentation based on the teachings of the present invention or the above embodiments, combined with common knowledge, ordinary technical knowledge in the field, and / or prior art, should all be included within the scope of protection of the present invention.

Claims

1. A method for manufacturing a lower body structure of a light passenger vehicle body-in-white, characterized by: The steps include: S01: Prepare the vehicle floor assembly and rear frame assembly according to the mold; S02: Prepare the front panel assembly according to the chassis suspension configuration; S03: Prepare the front longitudinal beam assembly according to the chassis suspension configuration; S04: Welding the vehicle floor assembly and the front panel assembly into the upper portion of the body-in-white lower body structure; welding the rear frame assembly and the front longitudinal beam assembly into the lower portion of the body-in-white lower body structure; S05: welding the upper portion of the body-in-white lower body structure to the lower portion of the body-in-white lower body structure to assemble and form the body-in-white lower body structure; There is no specific order for the above steps S01 to S03.

2. The method for manufacturing a lower body structure of a light passenger vehicle body-in-white according to claim 1, characterized in that: The step S02 includes the following sub-steps: S021a: Prepare wheel cover assembly according to chassis suspension configuration; S022a: Prepare the front bulkhead cover and the front mid-panel according to the mold; S023a: Fix the wheel cover assembly to the front center panel, and fix the front bulkhead upper cover to the front center panel to assemble the front center assembly.

3. The method for manufacturing a lower body structure of a light passenger vehicle body-in-white according to claim 1, characterized in that: The step S02 includes the following sub-steps: S021b: Prepare wheel cover assembly according to chassis suspension configuration; S022b: Prepare the front bulkhead upper cover and the front mid-panel according to the mold, and trim and shape the front mid-panel; S023b: The wheel cover assembly is fixed to the front center panel, and the front bulkhead upper cover is fixed to the front center panel and the wheel cover assembly to assemble a front center assembly.

4. The method for manufacturing a lower body structure of a light passenger vehicle body-in-white according to claim 1, characterized in that: The step S03 further includes the following sub-steps: S031: Prepare the front longitudinal beam base according to the mold; S032: Prepare wheel extension beam according to chassis suspension; S033: Fix the wheel extension beam to the front longitudinal beam base beam to assemble the front longitudinal beam assembly.

5. The method for manufacturing a lower body structure of a light passenger vehicle body-in-white according to claim 1, characterized in that: The step S05 further includes the following sub-steps: S051: Prepare the front anti-collision beam assembly according to the mold; S052: After welding the upper portion of the body-in-white lower body structure to the lower portion of the body-in-white lower body structure, it is fixedly installed with the front anti-collision beam assembly to assemble and form the entire body-in-white lower body structure assembly.

6. The method for manufacturing the lower body structure of a light passenger vehicle body-in-white according to claim 5, characterized in that: The front anti-collision beam assembly includes a front anti-collision beam and an energy absorption box, and the energy absorption box is fixed to the front anti-collision beam.

Images