Automobile body double-door-ring structure and automobile

Abstract

The utility model discloses a vehicle body double-door-ring structure which comprises an A column part, a B column part, a C column part and a doorsill part, a first closed door ring is formed by the A column part, the B column part and the doorsill part, and a second closed door ring is formed by the C column part, the B column part and the doorsill part. The A-pillar part comprises an A-pillar upper part and an A-pillar lower part, an A-pillar inner welding seam is arranged between the A-pillar upper part and the A-pillar lower part, and an A-pillar doorsill welding seam is arranged between the A-pillar lower part and the doorsill part; the B-pillar part comprises a B-pillar upper part and a B-pillar lower part, a B-pillar inner weld joint is arranged between the B-pillar upper part and the B-pillar lower part, an A-pillar B-pillar weld joint is arranged between the B-pillar upper part and the A-pillar upper part, and a B-pillar doorsill weld joint is arranged between the B-pillar lower part and the doorsill part; the C-column part comprises a C-column upper part and a C-column lower part, a C-column inner weld joint is arranged between the C-column upper part and the C-column lower part, a B-column C-column weld joint is arranged between the C-column upper part and the B-column upper part, and a C-column doorsill weld joint is arranged between the C-column lower part and the doorsill part. The utility model further discloses an automobile with the automobile body double-door-ring structure.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a vehicle body double door ring structure and an automobile with the double door ring structure. Background Art

[0002] Nowadays, cars are used as a means of transportation in people's work and life. During actual driving, there is a certain probability of collision in the structure of the side of the car body. The existing double door ring is composed of many components and requires multiple welding. The welding process is complicated, which increases the workload and affects the overall strength of the double ring door, thereby affecting the driver's life safety. Summary of the invention

[0003] The utility model provides a vehicle body double door ring structure comprising an A-pillar portion, a B-pillar portion, a C-pillar portion and a door sill portion; the structure is simple and highly integrated, and can reduce welding links, shorten production lines, reduce the use of workstation tooling, and reduce production costs during the welding process.

[0004] On one hand, the utility model provides a vehicle body double door ring structure, comprising: an A-pillar portion, a B-pillar portion, a C-pillar portion and a threshold portion, wherein the A-pillar portion, the B-pillar portion and the threshold portion form a first closed door ring, and the C-pillar portion, the B-pillar portion and the threshold portion form a second closed door ring;

[0005] The A-pillar portion includes an A-pillar upper portion and an A-pillar lower portion, an A-pillar inner weld is provided between the A-pillar upper portion and the A-pillar lower portion, and an A-pillar threshold weld is provided between the A-pillar lower portion and the threshold portion;

[0006] The B-pillar portion includes a B-pillar upper portion and a B-pillar lower portion, a B-pillar inner weld is provided between the B-pillar upper portion and the B-pillar lower portion, an A-pillar-B-pillar weld is provided between the B-pillar upper portion and the A-pillar upper portion, and a B-pillar threshold weld is provided between the B-pillar lower portion and the threshold portion;

[0007] The C-pillar portion includes a C-pillar upper portion and a C-pillar lower portion, a C-pillar inner weld is provided between the C-pillar upper portion and the C-pillar lower portion, a B-pillar C-pillar weld is provided between the C-pillar upper portion and the B-pillar upper portion, and a C-pillar rocker weld is provided between the C-pillar lower portion and the rocker portion.

[0008] In one embodiment, the A-pillar and B-pillar welds are in the same straight line as the A-pillar door sill welds, and the B-pillar inner welds are in the same straight line as the C-pillar inner welds.

[0009] In one embodiment, the threshold portion includes a threshold outer panel and a threshold rear connecting plate, an inner threshold weld is provided between the threshold outer panel and the threshold rear connecting plate, the threshold outer panel is connected to the lower portion of the A-pillar and the lower portion of the B-pillar, and the threshold rear connecting plate is connected to the lower portion of the C-pillar.

[0010] In one embodiment, the B-pillar and C-pillar welds are in the same straight line as the side sill inner weld.

[0011] In one embodiment, an A-pillar support plate is provided on the upper portion of the A-pillar;

[0012] and / or A-pillar upper reinforcement plate;

[0013] and / or the A-pillar support plate and the A-pillar upper reinforcement plate are respectively welded to the upper portion of the A-pillar before hot stamping and then hot stamped into an integrated structure;

[0014] And / or the A-pillar support plate and the A-pillar upper reinforcement plate are respectively welded to the upper portion of the A-pillar after hot stamping.

[0015] In one embodiment, an A-pillar lower reinforcement plate is provided on the lower portion of the A-pillar;

[0016] and / or the A-pillar lower reinforcement plate is welded to the A-pillar lower portion before hot stamping and then hot stamped into an integrated structure;

[0017] And / or the A-pillar lower reinforcement plate is welded to the integrated structure of the lower portion of the A-pillar after hot stamping.

[0018] In one embodiment, a B-pillar reinforcement lining plate is provided on the lower portion of the B-pillar;

[0019] and / or B-pillar lower reinforcement plate;

[0020] and / or the B-pillar reinforcement lining plate and the B-pillar lower reinforcement plate are respectively welded to the lower portion of the B-pillar and hot stamped into an integrated structure;

[0021] And / or the B-pillar reinforcement lining plate and the B-pillar lower reinforcement plate are respectively welded to the lower part of the B-pillar after hot stamping.

[0022] In one embodiment, a threshold reinforcement plate assembly is installed on the threshold outer plate.

[0023] In one embodiment, the threshold reinforcement plate assembly includes a threshold reinforcement plate body, a threshold upper connecting plate, a threshold lower connecting plate and a threshold front connecting plate, wherein the threshold upper connecting plate is fixed to the top of the threshold reinforcement plate body, the threshold lower connecting plate is fixed to the bottom of the threshold reinforcement plate body, and the threshold front connecting plate is fixed to the top of the threshold reinforcement plate body.

[0024] Another aspect of the utility model provides a car, comprising the above-mentioned vehicle body double door ring structure.

[0025] The side double door ring assembly of the present application includes an A-pillar portion, a B-pillar portion, a C-pillar portion and a door sill portion; the composition structure is simple and the integration is high. During the welding process, the welding links can be reduced, the strength of the double door ring of the vehicle body can be increased, the welding production line can be shortened during actual welding, the use of workstation tooling can be reduced, and the production cost can be reduced; at the same time, the driver's life safety is guaranteed after a collision, and the driving safety is increased.

[0026] In this application, the A-pillar and B-pillar welds are in the same straight line as the A-pillar door sill welds, the B-pillar inner welds are in the same straight line as the C-pillar inner welds, and the B-pillar and C-pillar welds are in the same straight line as the door sill inner welds. In the actual welding process, the number of times the welding equipment switches its trajectory is reduced, thereby improving welding efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a front view schematic diagram of the overall structure of the vehicle body double door ring structure in one embodiment of the present application;

[0029] Figure 2 for Figure 1 Explosion diagram of

[0030] Figure 3 It is a rear view schematic diagram of the overall structure of the vehicle body double door ring structure in one embodiment of the present application;

[0031] Figure 4 for Figure 3 A three-dimensional schematic diagram of the center sill reinforcement plate assembly;

[0032] Figure 5 This is a schematic diagram of a softening area in one embodiment of the present application;

[0033] Figure 6 This is a schematic flow chart of a method for manufacturing a double door ring structure of a vehicle body in one embodiment of the present application;

[0034] Figure 7 It is a schematic flow chart of a method for manufacturing a double door ring structure of a vehicle body in one embodiment of the present application.

[0035] In the figure: 1, A-pillar; 11, upper part of A-pillar; 12, lower part of A-pillar; 2, B-pillar; 21, upper part of B-pillar; 22, lower part of B-pillar; 3, C-pillar; 31, upper part of C-pillar; 32, lower part of C-pillar; 4, door sill; 41, door sill outer plate; 42, door sill rear connecting plate; 51, first closed door ring; 52, second closed door ring; 61, A-pillar support plate; 62, A-pillar upper reinforcement plate; 63, A-pillar lower reinforcement plate; 64, B-pillar reinforcement lining plate; 65, B The lower pillar reinforcement plate; 66, the door sill reinforcement plate assembly; 661, the door sill reinforcement plate body; 662, the door sill upper connecting plate; 663, the door sill lower connecting plate; 664, the door sill front connecting plate; 71, the A-pillar inner weld; 72, the B-pillar inner weld; 73, the A-pillar and B-pillar weld; 74, the C-pillar inner weld; 75, the B-pillar and C-pillar weld; 76, the A-pillar door sill weld; 77, the B-pillar door sill weld; 78, the C-pillar door sill weld; 79, the door sill inner weld; 8, the softened area. DETAILED DESCRIPTION

[0036] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0039] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0040] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0041] Embodiment 1

[0042] See also Figure 1 As shown, this embodiment provides a vehicle body double door ring structure, including: an A-pillar portion 1, a B-pillar portion 2, a C-pillar portion 3 and a threshold portion 4, wherein the A-pillar portion 1, the B-pillar portion 2 and the threshold portion 4 form a first closed door ring 51, and the C-pillar portion 3, the B-pillar portion 2 and the threshold portion 4 form a second closed door ring 52; the A-pillar portion 1 includes an A-pillar upper portion 11 and an A-pillar lower portion 12, an A-pillar inner weld 71 is provided between the A-pillar upper portion 11 and the A-pillar lower portion 12, and an A-pillar threshold weld 76 is provided between the A-pillar lower portion 12 and the threshold portion 4; the B-pillar portion 2 includes a B-pillar upper portion 21 and B-pillar lower part 22, B-pillar upper part 21 and B-pillar lower part 22 have B-pillar inner weld 72, B-pillar upper part 21 and A-pillar upper part 11 have A-pillar B-pillar weld 73, B-pillar threshold weld 77 is provided between B-pillar lower part 22 and threshold part 4; C-pillar part 3 includes C-pillar upper part 31 and C-pillar lower part 32, C-pillar inner weld 74 is provided between C-pillar upper part 31 and C-pillar lower part 32, B-pillar C-pillar weld 75 is provided between C-pillar upper part 31 and B-pillar upper part 21, C-pillar threshold weld 78 is provided between C-pillar lower part 32 and threshold part 4. It is worth mentioning that in this embodiment, A-pillar part, B-pillar part, C-pillar part and threshold part are firstly welded to form a double door ring substrate, and then the double door ring substrate is sheared by hot stamping to form a vehicle body double door ring structure.

[0043] The side panel double door ring assembly of the present application includes an A-pillar portion 1, a B-pillar portion 2, a C-pillar portion 3 and a door sill portion 4; the component structure is simple and highly integrated, and can reduce welding links, shorten the production line, reduce the use of workstation tooling, and reduce production costs during the welding process.

[0044] See also Figure 1 As shown, in this application, the A-pillar B-pillar weld 73 and the A-pillar door sill weld 76 are in the same straight line, and the B-pillar inner weld 72 and the C-pillar inner weld 74 are in the same straight line. The above design reduces the number of track switching of the welding device during the actual welding process, improves welding efficiency, and reduces costs.

[0045] See also Figure 1As shown, a specific example of the present application, the threshold portion 4 includes a threshold outer plate 41 and a threshold rear connecting plate 42, a threshold inner weld 79 is provided between the threshold outer plate 41 and the threshold rear connecting plate 42, the threshold outer plate 41 is connected to the A-pillar lower portion 12 and the B-pillar lower portion 22, and the threshold rear connecting plate 42 is connected to the C-pillar lower portion 32. Specifically, the B-pillar and C-pillar welds 75 are in the same straight line with the threshold inner weld 79. This embodiment provides a specific structure of the threshold portion 4, wherein the B-pillar and C-pillar welds 75 are in the same straight line with the threshold inner weld 79, and in the actual welding process, the number of track switchings formed by the welding device is reduced, the welding efficiency is improved, and the cost is reduced.

[0046] See also Figure 2 As shown, a specific example of the present application, a threshold reinforcement plate assembly 66 is installed on the threshold outer panel 41, and the threshold reinforcement plate assembly 66 includes a threshold reinforcement plate body 661, an upper threshold connecting plate 662, a lower threshold connecting plate 663 and a threshold front connecting plate 664, the upper threshold connecting plate 662 is fixed to the top of the threshold reinforcement plate body 661, the lower threshold connecting plate 663 is fixed to the bottom of the threshold reinforcement plate body 661, and the front threshold connecting plate 664 is fixed to the end of the threshold reinforcement plate body 661. It should be noted that, in the present embodiment, the upper connecting plate 662 and the lower connecting plate 663 of the threshold are fixed to the threshold reinforcement plate body 661 by rivets; the front connecting plate 664 of the threshold includes three sheet metal plates, and the three sheet metal plates are riveted to the threshold reinforcement plate body 661 by rivets; the upper connecting plate 662, the lower connecting plate 663 of the threshold and the three sheet metal plates are all welded and fixedly connected to the threshold outer panel 41; wherein, the aluminum material of the threshold reinforcement plate body 661 is extruded and formed, and the energy absorption characteristics of the aluminum profile enhance the energy absorption effect of side collision and pillar collision, thereby reducing the deformation of the crew cabin and improving the safety of the vehicle.

[0047] See also Figure 2 As shown, a specific example provided by the present application is that an A-pillar support plate 61 is provided on the A-pillar upper portion 11; and / or an A-pillar upper reinforcement plate 62; and / or the A-pillar support plate 61 and the A-pillar upper reinforcement plate 62 are respectively welded to the A-pillar upper portion 11 before hot stamping and then hot stamped into an integrated structure; and / or the A-pillar support plate 61 and the A-pillar upper reinforcement plate 62 are respectively welded to the A-pillar upper portion 11 after hot stamping. The A-pillar support plate 61 and the A-pillar upper reinforcement plate 62 cooperate with the A-pillar upper portion 11 according to actual needs, and the present application does not limit it. The A-pillar support plate 61 and / or the A-pillar upper reinforcement plate 62 are added to the A-pillar upper portion 11, which increases the rigidity of the A-pillar upper portion 11, resists deformation, increases protection, and improves safety after impact.

[0048] See also Figure 2As shown, a specific example provided by the present application is that an A-pillar lower reinforcement plate 63 is provided on the A-pillar lower portion 12; and / or the A-pillar lower reinforcement plate 63 is welded to the A-pillar lower portion 12 before hot stamping and then hot stamped into an integrated structure; and / or the A-pillar lower reinforcement plate 63 is welded to the integrated structure of the A-pillar lower portion 12 after hot stamping. The connection method between the A-pillar lower reinforcement plate 63 and the A-pillar lower portion 12 is not limited. The A-pillar lower reinforcement plate 63 increases the rigidity of the A-pillar lower portion 12, resists deformation, increases protection, and improves safety after impact.

[0049] See also Figure 2 As shown, a specific example provided by the present application is that a B-pillar reinforcement lining plate 64 is provided on the B-pillar lower portion 22; and / or a B-pillar lower reinforcement plate 65; and / or the B-pillar reinforcement lining plate 64 and the B-pillar lower reinforcement plate 65 are respectively welded to the B-pillar lower portion 22 and hot stamped into an integrated structure; and / or the B-pillar reinforcement lining plate 64 and the B-pillar lower reinforcement plate 65 are respectively welded to the B-pillar lower portion 22 after hot stamping. The B-pillar reinforcement lining plate 64 and / or the B-pillar lower reinforcement plate 65 are fixedly arranged on the B-pillar lower portion 22 as required, wherein the fixing method of the B-pillar reinforcement lining plate 64 and the B-pillar lower reinforcement plate 65 to the B-pillar lower portion 22 is not limited. The B-pillar reinforcement lining plate 64 and the B-pillar lower reinforcement plate 65 increase the rigidity of the B-pillar lower portion 22, resist deformation, increase protection, and improve safety after impact. It is worth mentioning that the lower part 22 of the B-pillar has a softening area 8 by locally heating or laser heating the mold. The softening area 8 makes the strength of the side double door ring assembly differentiated, achieves energy absorption and anti-deformation effects, reduces the deformation of the passenger compartment due to side collision and pillar collision, and improves vehicle safety.

[0050] In this embodiment, the materials of the A-pillar upper portion 11, the A-pillar lower portion 12, the B-pillar upper portion 21, the B-pillar lower portion 22, and the door sill rear connecting plate 42 can be CR950 / 1300HS, CR950 / 1300HS-AS, CR1200 / 1800HS, CR1200 / 1800HS-AS; the thickness range is 1.2mm-2.0mm. The material of the door sill outer plate 41 can be CR370 / 550HS-AS, CR780 / 980HS-AS, CR950 / 1300HS, CR950 / 1300HS-AS, and the thickness range is 1.4-1.8mm. The specific grade and thickness are selected according to the energy absorption effect required by the collision analysis. The manufacturing materials of the C-pillar upper part 31 and the C-pillar lower part 32 are CR370 / 550HS-AS, CR780 / 980HS-AS, CR950 / 1300HS, CR950 / 1300HS-AS, CR950 / 1300HS-AS, with a thickness range of 0.8-1.6mm. It should be noted that the coated plate and the non-coated plate used in each part of the above-mentioned side double door ring cannot be mixed (either all coated plates or all non-coated plates), wherein the manufacturing materials of the coated plates can be (coating thickness 75 / 75, 25 / 25): CR950 / 1300HS-AS, CR370 / 550HS-AS, CR780 / 980HS-AS, CR1200 / 1800HS-AS, and the manufacturing materials of the non-coated plates can be: CR950 / 1300HS, CR1200 / 1800HS. The above material selections are some specific examples of the present application. The technical solution of the present application can be manufactured by selecting materials according to one's own needs.

[0051] Embodiment 2

[0052] This embodiment provides a method for manufacturing a double door ring structure of a vehicle body in Embodiment 1, comprising the following steps:

[0053] Step S100 : Select a steel coil of required material, and cut out an A-pillar upper portion 11 , an A-pillar lower portion 12 , a B-pillar upper portion 21 , a B-pillar lower portion 22 , a C-pillar upper portion 31 , a C-pillar lower portion 32 , a sill outer panel 41 , and a sill rear connecting panel 42 .

[0054] Step S200: Laser weld the A-pillar upper portion 11, the A-pillar lower portion 12, the B-pillar upper portion 21, the B-pillar lower portion 22, the C-pillar upper portion 31, the C-pillar lower portion 32, the rocker outer panel 41 and the rocker rear connecting panel 42 in step S100 to form a side panel double door ring assembly substrate having a first double door ring structure.

[0055] Step S300: hot stamping and shearing the side panel double door ring assembly substrate to form a vehicle body double door ring structure.

[0056] See also Figure 4 As shown, in some embodiments, step S100 further includes step S110, step S110: cutting the A-pillar support plate 61, the A-pillar upper reinforcement plate 62, the A-pillar lower reinforcement plate 63, the B-pillar reinforcement lining plate 64, the B-pillar lower reinforcement plate 65, the sill reinforcement plate body 661, the sill upper connecting plate 662, the sill lower connecting plate 663 and the sill front connecting plate 664; then step S200 also includes step S210, step S210: cutting the A-pillar support plate 61 and ... The upper pillar reinforcement plate 62 is welded to the upper portion of the A-pillar 11, the lower A-pillar reinforcement plate 63 is welded to the lower portion of the A-pillar 12, the B-pillar reinforcement lining plate 64 and the lower B-pillar reinforcement plate 65 are welded to the lower portion of the B-pillar 22, the upper threshold connecting plate 662, the lower threshold connecting plate 663 and the front threshold connecting plate 664 are riveted to the threshold reinforcement plate body 661 to form a threshold reinforcement plate assembly 66, and then the upper threshold connecting plate 662, the lower threshold connecting plate 663 and the front threshold connecting plate 664 are welded to the threshold outer panel 41.

[0057] See also Figure 5 As shown, in some embodiments, step S100 further includes step S110: cutting the A-pillar support plate 61, the A-pillar upper reinforcement plate 62, the A-pillar lower reinforcement plate 63, the B-pillar reinforcement lining plate 64, the B-pillar lower reinforcement plate 65, the sill reinforcement plate body 661, the sill upper connecting plate 662, the sill lower connecting plate 663 and the sill front connecting plate 664; and step S400: welding the A-pillar support plate 61 and the A-pillar upper reinforcement plate 62 to the A-pillar upper portion 11 of the double door ring structure of the vehicle body The A-pillar lower reinforcement plate 63 is welded to the A-pillar lower portion 12 of the double door ring structure of the vehicle body, the B-pillar reinforcement lining plate 64 and the B-pillar lower reinforcement plate 65 are welded to the B-pillar lower portion 22 of the double door ring structure of the vehicle body, the threshold upper connecting plate 662, the threshold lower connecting plate 663 and the threshold front connecting plate 664 are riveted to the threshold reinforcement plate body 661 to form a threshold reinforcement plate assembly 66, and then the threshold upper connecting plate 662, the threshold lower connecting plate 663 and the threshold front connecting plate 664 are welded to the threshold outer plate 41 of the double door ring structure of the vehicle body.

[0058] The above-mentioned manufacturing method is a specific example of the manufacturing method of the side panel double door ring assembly of the present application, but the present application does not limit the specific manufacturing method, and it can be selected according to actual needs; the manufacturing method in this embodiment is simple, and the formed side panel double door ring assembly has high strength, can effectively absorb external impacts, and protect vehicle safety.

[0059] Embodiment 3

[0060] The present embodiment provides an automobile, including a vehicle body double door ring structure in the first embodiment, and a side panel double door ring assembly is installed on the vehicle body. During actual use, the side panel double door ring assembly in the present embodiment is an integrated structure to ensure the overall strength, but a softening area 8 is provided at the lower part 22 of the B-pillar, so that the strength of the side panel double door ring assembly is differentially distributed, thereby achieving energy absorption and anti-deformation effects, reducing the deformation of the passenger compartment due to side collision and pillar collision, and improving vehicle safety.

[0061] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A double door ring structure for a vehicle body, characterized in that: include: An A-pillar portion (1), a B-pillar portion (2), a C-pillar portion (3) and a door sill portion (4), wherein the A-pillar portion (1), the B-pillar portion (2) and the door sill portion (4) form a first closed door ring (51), and the C-pillar portion (3), the B-pillar portion (2) and the door sill portion (4) form a second closed door ring (52); The A-pillar portion (1) comprises an A-pillar upper portion (11) and an A-pillar lower portion (12); an A-pillar inner weld (71) is provided between the A-pillar upper portion (11) and the A-pillar lower portion (12); and an A-pillar door sill weld (76) is provided between the A-pillar lower portion (12) and the door sill portion (4); The B-pillar portion (2) comprises a B-pillar upper portion (21) and a B-pillar lower portion (22); a B-pillar inner weld (72) is provided between the B-pillar upper portion (21) and the B-pillar lower portion (22); an A-pillar-B-pillar weld (73) is provided between the B-pillar upper portion (21) and the A-pillar upper portion (11); and a B-pillar threshold weld (77) is provided between the B-pillar lower portion (22) and the threshold portion (4); The C-pillar portion (3) comprises a C-pillar upper portion (31) and a C-pillar lower portion (32); a C-pillar inner weld (74) is provided between the C-pillar upper portion (31) and the C-pillar lower portion (32); a B-pillar C-pillar weld (75) is provided between the C-pillar upper portion (31) and the B-pillar upper portion (21); and a C-pillar threshold weld (78) is provided between the C-pillar lower portion (32) and the threshold portion (4).

2. The double door ring structure of the vehicle body as claimed in claim 1, characterized in that: The A-pillar and B-pillar welds (73) and the A-pillar door sill welds (76) are in the same straight line, and the B-pillar inner welds (72) and the C-pillar inner welds (74) are in the same straight line.

3. The double door ring structure of the vehicle body as claimed in claim 1, characterized in that: The threshold portion (4) comprises a threshold outer panel (41) and a threshold rear connecting panel (42), wherein an inner threshold weld (79) is provided between the threshold outer panel (41) and the threshold rear connecting panel (42), wherein the threshold outer panel (41) is connected to the lower portion of the A-pillar (12) and the lower portion of the B-pillar (22), and the threshold rear connecting panel (42) is connected to the lower portion of the C-pillar (32).

4. The double door ring structure of the vehicle body as claimed in claim 3, characterized in that: The B-pillar and C-pillar welds (75) are in the same straight line as the door sill inner weld (79).

5. The vehicle body double door ring structure as claimed in claim 1, characterized in that: An A-pillar support plate (61) is provided on the A-pillar upper portion (11); and / or an A-pillar upper reinforcement plate (62); and / or the A-pillar support plate (61) and the A-pillar upper reinforcement plate (62) are respectively welded to the A-pillar upper portion (11) before hot stamping and then hot stamped into an integrated structure; And / or the A-pillar support plate (61) and the A-pillar upper reinforcement plate (62) are respectively welded to the A-pillar upper portion (11) after hot stamping.

6. The vehicle body double door ring structure as claimed in claim 1, characterized in that: An A-pillar lower reinforcement plate (63) is provided on the A-pillar lower portion (12); and / or the A-pillar lower reinforcement plate (63) is welded to the A-pillar lower portion (12) before hot stamping and then hot stamped into an integrated structure; And / or the A-pillar lower reinforcement plate (63) is welded to the integrated structure of the A-pillar lower part (12) after hot stamping.

7. The vehicle body double door ring structure as claimed in claim 1, characterized in that: A B-pillar reinforcement lining plate (64) is provided on the B-pillar lower portion (22); and / or a B-pillar lower reinforcement plate (65); and / or the B-pillar reinforcement lining plate (64) and the B-pillar lower reinforcement plate (65) are respectively welded to the B-pillar lower portion (22) and hot stamped into an integrated structure; And / or the B-pillar reinforcement lining plate (64) and the B-pillar lower reinforcement plate (65) are respectively welded to the B-pillar lower portion (22) after hot stamping.

8. The vehicle body double door ring structure as claimed in claim 1, characterized in that: It also includes a sill reinforcement plate assembly (66) installed on the sill outer plate (41) to improve the energy absorption effect of the side double door ring assembly.

9. The vehicle body double door ring structure as claimed in claim 8, characterized in that: The threshold reinforcement plate assembly (66) comprises a threshold reinforcement plate body (661), an upper threshold connection plate (662), a lower threshold connection plate (663) and a threshold front connection plate (664), wherein the upper threshold connection plate (662) is fixed to the top of the threshold reinforcement plate body (661), the lower threshold connection plate (663) is fixed to the bottom of the threshold reinforcement plate body (661), and the threshold front connection plate (664) is fixed to the top of the threshold reinforcement plate body (661).

10. An automobile, characterized in that: It comprises a vehicle body double door ring structure as described in any one of claims 1-9.

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