CN216508630U

CN216508630U - Vehicle body C column lower joint structure

Info

Publication number: CN216508630U
Application number: CN202122794242.0U
Authority: CN
Inventors: 凌勇; 陈智家; 齐鲁杰; 丁为广
Original assignee: Zhejiang Zero Run Technology Co Ltd
Current assignee: Zhejiang Zero Run Technology Co Ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-05-13
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a C-column lower joint structure of a vehicle body, which comprises a rear wheel casing reinforcing part arranged between a rear shock absorber mounting reinforcing plate and a rear longitudinal beam, wherein a rear floor rear cross beam assembly is arranged at the position, corresponding to the rear wheel casing reinforcing part, of the outer side of the rear longitudinal beam; the rear floor rear cross beam assembly comprises a rear cross beam side supporting plate, and the rear cross beam side supporting plate comprises joint side walls corresponding to the first corner connecting partition plate piece and the second corner connecting partition plate piece respectively. Fill respectively through rear wheel casing reinforcement both sides and set up first angle baffle spare and second angle baffle spare that connects, optimize the connection structure between rear wheel casing reinforcement and the back longeron as closed cavity, strengthen the rigidity of the weak junction in C post lower extreme, promote vehicle life.

Description

Vehicle body C column lower joint structure

Technical Field

The utility model relates to the technical field of vehicle body manufacturing, in particular to a lower joint structure of a C column of a vehicle body.

Background

The torsion mode and the rigidity of a white automobile body are important requirements of the whole automobile performance, so that a white automobile body framework must have enough torsion mode and rigidity, the main parts influencing the torsion performance of the automobile body from a simulation result are a front cabin and a rear structure, and particularly under the condition that the connection relation and the structural form between metal plates at the joint position of the rear structural member of the automobile body are not good, the torsion mode and the rigidity of the white automobile body are easily insufficient, so that the joint position can deform in the driving process of the automobile, the fatigue durability problem of the metal plates is caused seriously, and the service life of the automobile is influenced.

In the prior art, in order to increase the torsional mode and the rigidity of a vehicle body framework, the common scheme is to change the material thickness of parts at a key structure or increase a structural reinforcement, so that the weight of the whole vehicle is increased on one hand, and the cost of the single vehicle is increased on the other hand.

For example, chinese patent document (publication No. CN 204037679U) discloses "a vehicle and a C-pillar assembly for the vehicle", the C-pillar assembly including: two rear stringers; two rear cross members; the lower end of the C column is provided with a front connecting part at the lower end of the C column and a rear connecting part at the lower end of the C column, the front connecting part at the lower end of the C column is fixed with the rear longitudinal beam at the corresponding side and the rear cross beam at the front, and the rear connecting part at the lower end of the C column is fixed with the rear longitudinal beam at the corresponding side and the rear cross beam at the rear; and the two ends of the top cover rear cross beam are respectively fixed with the upper ends of the left and right C columns. According to the C-column assembly for the vehicle, the two C columns, the top cover rear cross beam and the two rear cross beams are used for forming the first closed loop and the second closed loop, and two force transmission channels can be provided for the C-column assembly, so that the torsional rigidity and the top compressive strength of the vehicle can be obviously enhanced, the NVH performance of the whole vehicle can be improved, vibration is reduced, noise is reduced, and the riding comfort is improved.

In the technical scheme, although the two C columns are matched with the rear top cover beam and the two rear part beams to form the first closed loop and the second closed loop, two force transmission channels can be provided for the C column assembly to enhance the torsional rigidity of the vehicle, the C columns are only connected with the rear top cover beam in a welding mode, stress is concentrated to act on welding points of two joint surfaces, and the torsional rigidity obviously has an optimized space.

Disclosure of Invention

Aiming at the problems that the existing C-column lower end connecting structure mentioned in the background technology is not ideal enough and the torsional mode and rigidity of a vehicle body are still influenced, the utility model provides the vehicle body C-column lower joint structure.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a lower joint structure of a C column of an automobile body comprises a rear wheel casing reinforcing part arranged between a rear shock absorber mounting reinforcing plate and a rear longitudinal beam, wherein a rear floor rear cross beam assembly is arranged at the position, corresponding to the rear wheel casing reinforcing part, of the outer side of the rear longitudinal beam; the rear floor rear cross beam assembly comprises a rear cross beam side supporting plate, and the rear cross beam side supporting plate comprises joint side walls corresponding to the first corner connecting partition plate piece and the second corner connecting partition plate piece respectively. The first corner connecting partition plate piece and the second corner connecting partition plate piece are used for sealing and filling gaps between two sides of the rear wheel cover reinforcing piece and the rear longitudinal beam. After the first corner connecting partition plate piece and the second corner connecting partition plate piece are arranged below two sides of the rear wheel casing, the rear wheel casing reinforcing piece can be ensured to be connected with the rear longitudinal beam in a three-dimensional mode, the lower end of the C column is stably connected with the rear longitudinal beam, the rear cross beam side plate is arranged on the side wall of the rear longitudinal beam in a spaced mode and corresponds to the first corner connecting partition plate piece and the second corner connecting partition plate piece, and therefore impact load born by an automobile body acts on the rear longitudinal beam and then can be stably transmitted along the rear floor rear cross beam assembly. Two joint side walls of the rear cross beam supporting plate respectively correspond to the first corner connecting partition plate piece and the second corner connecting partition plate piece, and the force transmission route is optimized and is clearer.

Preferably, the rear floor rear cross beam side brace comprises a bottom plate, the joint side wall comprises a first vertical enclosing plate and a second vertical enclosing plate which are respectively arranged on two sides of the bottom plate, the first vertical enclosing plate abuts against the outer side of the rear longitudinal beam corresponding to the first corner connecting partition plate, and the second vertical enclosing plate abuts against the outer side of the rear longitudinal beam far away from the rear shock absorber installation reinforcing plate corresponding to the second corner connecting partition plate. The first upright surrounding plate and the second upright surrounding plate are both bearing plates, when the pressure of the C column is transmitted to the rear longitudinal beam from the rear wheel cover reinforcement, the pressure is applied to the side wall of the rear longitudinal beam through the first corner connecting partition plate and the second corner connecting partition plate at the corner connecting part of the rear wheel cover reinforcement, and at the moment, the first upright surrounding plate is abutted against the outer side of a force application point of the first corner connecting partition plate on the rear longitudinal beam, so that the pressure borne by the rear longitudinal beam can be continuously transmitted to the rear floor rear cross beam assembly, and the rear longitudinal beam is protected; by analogy, the second upright surrounding plate is abutted to the outer side of the force application point of the second corner connecting partition plate on the rear longitudinal beam, the pressure from the second corner connecting partition plate is transmitted, and the first upright surrounding plate and the second upright surrounding plate complete the work of bearing the load together.

Preferably, the first corner connecting partition plate and the second corner connecting partition plate are both arranged in a cavity of the rear longitudinal beam, flanges are arranged at the upper ends of the first corner connecting partition plate and the second corner connecting partition plate, and the flanges are welded with the rear wheel cover reinforcement; and the other sides of the first corner connecting partition plate and the second corner connecting partition plate except the upper end are welded with the cavity wall of the cavity of the rear longitudinal beam.

Furthermore, a closed cavity is formed between the rear wheel cover reinforcing part and the rear longitudinal beam, and the two sides of the closed cavity use the first corner connecting partition plate part and the second corner connecting partition plate part as side walls.

First connect angle division board and second to connect the both sides bottom surface of angle division board through upper end turn-ups welded connection rear wheel casing reinforcing plate, first connect angle division board to be the rectangle structure, first connect angle division board except that the turn-ups of upper end other trilateral turn-ups structure is connected with rear longitudinal cavity's front and back lateral wall and bottom plate respectively, form closed side wall with this, the second of opposite side connects angle division board equally to seal the side bottom surface of rear wheel casing reinforcing plate, form the closed structure chamber with first angle division board and second angle division board between rear longitudinal and the rear wheel casing reinforcing plate so far, furthest's promotion C post lower extreme joint strength.

Preferably, the rear floor rear cross beam assembly further comprises a rear lower cross beam, and the tail part of the rear cross beam side supporting plate is welded with the rear lower cross beam. The rear lower cross beam is arranged at the rear part of the rear cross beam side supporting plate and used for constructing a force transmission route, so that the impact load borne by the automobile body can be transmitted to the rear cross beam side supporting plate from a closed structure cavity formed by the rear longitudinal beam and the rear wheel cover reinforcing plate and is continuously and stably transmitted to the rear floor, and the phenomenon that the connecting structure is likely to break due to fatigue due to stress concentration in the route is avoided.

Preferably, vertical surfaces are arranged on two sides of the rear wheel cover reinforcing plate, and the rear shock absorber mounting reinforcing plate is welded with the vertical surfaces.

The rear wheel casing reinforcing plate is welded with the rear shock absorber installation reinforcing plate through the vertical face, the rear shock absorber installation reinforcing plate serves as the tail end of the C column, and the rear longitudinal beam and the rear floor rear cross beam assembly can be connected through the rear wheel casing reinforcing piece. The connecting mode of vertical face welding can improve the connecting strength of the rear shock absorber installation reinforcing plate and the rear wheel cover reinforcing piece to the maximum extent.

Furthermore, the rear shock absorber installation reinforcing plate comprises a first reinforcing cavity, the rear wheel cover reinforcing piece comprises a second reinforcing cavity, and the rear cross beam side supporting plate comprises a third reinforcing cavity. The first reinforcing cavity is a rib type reinforcing structure formed by the rear shock absorber installation reinforcing plate in a self-forming mode, and correspondingly, the second reinforcing cavity and the third reinforcing cavity are also provided with reinforcing structures which can jointly improve the rigidity of each part at the lower end of the C column and improve the torsional mode. After the rigidity of the components is guaranteed, the connection strength can be enhanced by matching the closed structural cavities formed by welding the components with each other, so that the mechanical property of the C column lower joint is optimized, and the service life is prolonged.

Therefore, the utility model has the following beneficial effects: (1) the first corner-connecting partition plate piece and the second corner-connecting partition plate piece are respectively filled and arranged on the two sides of the rear wheel cover reinforcement, so that the connecting structure between the rear wheel cover reinforcement and the rear longitudinal beam is optimized into a closed cavity, the force transmission path is newly increased, meanwhile, the rigidity of the weak connecting part at the lower end of the C column can be enhanced by means of the first corner-connecting partition plate piece and the second corner-connecting partition plate piece, and the service life of a vehicle is prolonged; (2) two joint side walls of the rear cross beam supporting plate respectively correspond to the first corner connecting partition plate piece and the second corner connecting partition plate piece, so that the force transmission route of the C column is optimized and clearer; (3) the first upright surrounding plate is abutted to the force application point of the first corner connecting partition plate on the rear longitudinal beam, so that the pressure borne by the rear longitudinal beam can be continuously transmitted to the rear floor rear cross beam assembly to protect the rear longitudinal beam.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

In the figure: 1. the rear shock absorber installation reinforcing plate comprises a rear shock absorber installation reinforcing plate body, 11, a first reinforcing cavity, 2, a rear longitudinal beam, 21, a cavity, 3, a rear wheel cover reinforcing piece, 31, a second reinforcing cavity, 32, a vertical face, 4, a rear floor rear cross beam assembly, 41, a rear lower cross beam, 5, a first corner connecting partition plate body, 6, a second corner connecting partition plate body, 7, a rear cross beam side supporting plate, 71, a joint side wall, 72, a bottom plate, 73, a first vertical wall plate, 74, a second vertical wall plate, 8, a flanging, 9 and a third reinforcing cavity.

Detailed Description

The utility model is further described with reference to the following detailed description and accompanying drawings. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "center", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

As shown in fig. 1 and 2, a C-pillar lower joint structure of a vehicle body comprises a rear wheel casing reinforcement 3 arranged between a rear shock absorber mounting reinforcement plate 1 and a rear longitudinal beam 2, wherein a rear floor rear cross beam assembly 4 is arranged at a position, corresponding to the rear wheel casing reinforcement 3, on the outer side of the rear longitudinal beam 2, a first corner connecting partition plate 5 and a second corner connecting partition plate 6 are respectively arranged on two sides of the rear wheel casing reinforcement 3, the first corner connecting partition plate 5 is filled in a left side gap at the joint of the rear longitudinal beam 2 and the rear wheel casing reinforcement 3, and the second corner connecting partition plate 6 is filled in a right side gap at the joint of the rear longitudinal beam 2 and the rear wheel casing reinforcement 3; the rear floor rear cross member assembly 4 includes a rear cross member side stay 7, and the rear cross member side stay 7 includes joint side walls 71 corresponding to the first corner gusset piece 5 and the second corner gusset piece 6, respectively. The rear floor rear cross beam side supporting plate 7 comprises a bottom plate 72, the joint side wall 71 comprises a first vertical wall 73 and a second vertical wall 74 which are respectively arranged at two sides of the bottom plate 72, the first vertical wall 73 is abutted to the outer side of the rear longitudinal beam 2 corresponding to the first corner connecting partition plate 5, and the second vertical wall 74 is abutted to the outer side of the rear longitudinal beam 2 far away from the rear shock absorber installation reinforcing plate 1 corresponding to the second corner connecting partition plate 6.

The first corner connecting partition plate piece 5 and the second corner connecting partition plate piece 6 are used for sealing and filling the gap between the two sides of the rear wheel cover reinforcement 3 and the rear longitudinal beam 2. Set up in rear wheel casing both sides below back at first connecing angle partition plate spare 5 and second to connect angle partition plate spare 6, can ensure that rear wheel casing reinforcement 3 forms three-dimensional with back longeron 2 and is connected, this makes C post lower extreme and back longeron 2 stable joint, and then crossbeam fagging 7 is then 2 lateral walls of interval back longeron and correspond first connecing angle partition plate spare 5 and the setting of second connecing angle partition plate spare 6 for can stabilize the transmission to back floor rear frame member assembly 4 after the impact load who bears by the automobile body acts on back longeron 2. Two joint side walls 71 of the rear cross beam support plate respectively correspond to the first corner-connecting partition plate piece 5 and the second corner-connecting partition plate piece 6, and the force transmission route is optimized and is clearer. The first upright surrounding plate 73 and the second upright surrounding plate 74 are both bearing plates, when the pressure of the C-column is transmitted from the rear wheel cover reinforcement 3 to the rear longitudinal beam 2, the pressure is applied to the side wall of the rear longitudinal beam 2 through the first corner connecting partition plate 5 and the second corner connecting partition plate 6 at the corner connecting part of the rear wheel cover reinforcement 3, at the moment, the first upright surrounding plate 73 is abutted to the outer side of the force application point of the first corner connecting partition plate 5 on the rear longitudinal beam 2, so that the pressure borne by the rear longitudinal beam 2 can be continuously transmitted to the rear floor rear cross beam assembly 4, and the rear longitudinal beam 2 is protected; by analogy, the second standing plate 74 abuts against the outer side of the force application point of the second corner connecting partition plate 6 on the rear longitudinal beam 2, the pressure from the second corner connecting partition plate 6 is transmitted, and the first standing plate 73 and the second standing plate 74 complete the work of receiving the pressure of the C column together.

The first corner connecting partition plate 5 and the second corner connecting partition plate 6 are both arranged in a cavity 21 of the rear longitudinal beam 2, flanges 8 are arranged at the upper ends of the first corner connecting partition plate 5 and the second corner connecting partition plate 6, and the flanges 8 are welded with the rear wheel cover reinforcement 3; the other sides of the first corner connecting partition plate 5 and the second corner connecting partition plate 6 except the upper end are welded with the cavity wall 21 of the rear longitudinal beam 2. Furthermore, a closed cavity is formed between the rear wheel cover reinforcing part 3 and the rear longitudinal beam 2, and the two sides of the closed cavity use the first corner connecting partition plate part 5 and the second corner connecting partition plate part 6 as side walls.

First connect angle baffle 5 and second to connect the both sides bottom surface of angle baffle 6 through 8 welded connection rear wheel casing reinforcing plates of upper end turn-ups, first connect angle baffle 5 to be the rectangle structure, first connect angle baffle 5 except that the turn-ups 8 of upper end other trilateral turn-ups 8 structures are connected with back longeron die cavity 21 front and back lateral wall and bottom plate 72 respectively, form closed side wall with this, the second of opposite side connects angle baffle 6 and seals the side bottom surface of rear wheel casing reinforcing plate equally, form between this back longeron 2 and the rear wheel casing reinforcing plate and connect angle baffle 5 and second with first connecing angle baffle 5 and second to connect the angle

The closed structure cavity of the partition plate piece improves the connection strength of the lower end of the C column to the maximum extent.

The rear floor rear cross beam assembly 4 further comprises a rear lower cross beam 41, and the tail part of the rear cross beam side supporting plate 7 is welded with the rear lower cross beam 41. The rear lower cross beam 41 is arranged at the rear part of the rear cross beam side supporting plate 7 and is used for constructing a force transmission path, so that the impact load borne by the vehicle body can be transmitted to the rear cross beam side supporting plate 7 from a closed structure cavity formed by the rear longitudinal beam 2 and the rear wheel cover reinforcing plate and is continuously and stably transmitted to the rear floor, and the phenomenon that the connecting structure is broken possibly due to fatigue due to stress concentration in the path can be avoided.

Vertical surfaces 32 are arranged on two sides of the rear wheel cover reinforcing plate, and the rear shock absorber mounting reinforcing plate 1 is welded with the vertical surfaces 32. Further, rear shock absorber installation reinforcing plate 1 is including first enhancement die cavity 11, rear wheel casing reinforcement 3 is including second enhancement die cavity 31, rear cross beam side arm brace 7 is including third enhancement die cavity 9.

The rear wheel house reinforcing plate is welded to the rear shock absorber mounting reinforcing plate 1 through the vertical surface 32, and the rear shock absorber mounting reinforcing plate 1 serves as the end of the C-pillar and can be joined to the rear longitudinal beam 2 and the rear floor rear cross member assembly 4 through the rear wheel house reinforcement 3. The connecting mode of welding the vertical surface 32 can improve the connecting strength of the rear shock absorber installation reinforcing plate 1 and the rear wheel cover reinforcing piece 3 to the maximum extent. The first reinforcing cavity 11 is a rib-type reinforcing structure formed by the rear shock absorber mounting reinforcing plate 1, and correspondingly, the second reinforcing cavity 31 and the third reinforcing cavity 9 also have reinforcing structures which can improve the rigidity of each part at the lower end of the C column and improve the torsional mode. After the rigidity of the components is guaranteed, the connection strength can be enhanced by matching the closed structural cavities formed by welding the components with each other, so that the mechanical property of the C column lower joint is optimized, and the service life is prolonged.

The lower joint structure of the C column of the vehicle body disclosed by the utility model forms a more excellent force transmission path:

transmission path 1 (as indicated by the right-hand dashed-dotted path in fig. 2): c ring lower joint structure side transmission path: the rear shock absorber installation reinforcing plate 1, the side vertical surface 32 of the rear wheel cover reinforcing piece 3, the first corner connecting partition plate piece 5, the rear floor rear cross beam side supporting plate 7 and the side vertical surface 32 of the part are connected with one another to form a continuous transmission path.

Transfer path 2 (as shown by the left-hand dashed path in fig. 2): c ring lower joint structure side transmission path: the rear shock absorber installation reinforcing plate 1, the side vertical surface 32 of the rear wheel cover reinforcing piece 3, the second corner connecting partition plate piece 6, the rear floor rear cross beam side supporting plate 7 and the part side vertical surfaces 32 are connected with one another to form a continuous transmission path.

In addition to the above-mentioned optimization scheme to traditional power transmission route, this application has still increased the rigidity of third power transmission route in order to further promote C post lower clutch:

transfer path 3 (shown as dotted-dashed path in the middle of fig. 2): the rear shock absorber installation reinforcing plate 1 is a part closed cavity, namely a rear wheel cover reinforcing member 3 closed cavity, a closed structure cavity formed by combining a first corner connecting partition plate member 5, a second corner connecting partition plate member 6 and a rear longitudinal beam 2, namely a rear floor rear cross beam side supporting plate 7 cavity, and the part cavities are connected to form a continuous closed cavity force transmission path. The strength of the C-ring lower connector connecting structure is achieved under the condition that the material thickness of parts is not changed, the increase of the weight and the cost of the whole vehicle is avoided, and the torsion mode and the rigidity of the vehicle body are effectively improved.

In addition to the above embodiments, the technical features of the present invention can be re-selected and combined to form new embodiments within the scope of the claims and the specification of the present invention, which are all realized by those skilled in the art without creative efforts, and thus, the embodiments of the present invention which are not described in detail should be regarded as the specific embodiments of the present invention and are within the protection scope of the present invention.

Claims

1. A lower joint structure of a C column of an automobile body comprises a rear wheel casing reinforcing part arranged between a rear shock absorber mounting reinforcing plate and a rear longitudinal beam, wherein a rear floor rear cross beam assembly is arranged at the position, corresponding to the rear wheel casing reinforcing part, of the outer side of the rear longitudinal beam; the rear floor rear cross beam assembly comprises a rear cross beam side supporting plate, and the rear cross beam side supporting plate comprises joint side walls corresponding to the first corner connecting partition plate piece and the second corner connecting partition plate piece respectively.

2. The vehicle body C-pillar lower joint structure according to claim 1, wherein the rear floor rear cross member side brace includes a bottom plate, the joint side brace includes a first standing plate and a second standing plate respectively disposed at two sides of the bottom plate, the first standing plate abuts against an outer side of the rear side member corresponding to the first corner connecting partition member, and the second standing plate abuts against an outer side of the rear side member away from the rear shock absorber mounting reinforcement plate corresponding to the second corner connecting partition member.

3. The vehicle body C column lower joint structure is characterized in that a first corner joint spacer piece and a second corner joint spacer piece are arranged in a cavity of a rear longitudinal beam, flanges are arranged at the upper ends of the first corner joint spacer piece and the second corner joint spacer piece, and the flanges are welded with a rear wheel cover reinforcing piece; the first corner connecting partition plate and the second corner connecting partition plate except the upper end have other sides welded to the cavity wall of the back longitudinal beam.

4. The vehicle body C-pillar lower joint structure according to claim 1, wherein said rear floor rear cross member assembly further comprises a rear lower cross member, and a rear portion of said rear cross member side stay is welded to said rear lower cross member.

5. The vehicle body C-pillar lower joint structure according to claim 1, wherein vertical surfaces are provided on both sides of the rear wheel house reinforcement plate, and the rear shock absorber mounting reinforcement plate is welded to the vertical surfaces.

6. The vehicle body C-pillar lower joint structure according to any one of claims 1 to 5, wherein said rear shock absorber mounting reinforcement plate includes a first reinforcement cavity, said rear wheel house reinforcement member includes a second reinforcement cavity, and said rear cross member side stay plate includes a third reinforcement cavity.

7. The lower joint structure of the C-pillar of a vehicle body according to any one of claims 1 to 5, wherein a closed cavity is formed between the rear wheel house reinforcement and the rear side member, and the closed cavity is flanked on both sides by the first corner bulkhead piece and the second corner bulkhead piece.