Column B upper joint structure and vehicle
By employing a multi-segment overlapping and cavity design in the B-pillar joint structure to form a double-support structure, the problem of insufficient strength of traditional B-pillar joints during vehicle collisions is solved, thereby improving vehicle safety and impact resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional B-pillar joint structures are insufficient in strength during side collisions and roof compressions, leading to structural deformation or breakage and failing to effectively disperse collision energy, thus affecting occupant safety.
A joint structure for the B-pillar is designed, which adopts a multi-segment overlapping and cavity design of the upper beam reinforcement plate and the B-pillar reinforcement plate to form a double support structure. The cavity is formed by connecting and enclosing the bending part, which increases the overlapping area and tolerance space. High-strength steel and welding technology are used to ensure the connection strength, and energy-absorbing material is filled in the cavity.
It significantly improves the ability to distribute top loads, reduces the transmission of impact forces into the vehicle, lowers the risk of occupant injury, and enhances the impact resistance and safety of the vehicle body structure.
Smart Images
Figure CN224045278U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of automobile body structure, and particularly relates to a B-pillar upper joint structure and a vehicle. BACKGROUND
[0002] In the overall architecture of an automobile, the B-pillar upper joint structure is a crucial component. It not only undertakes the task of connecting multiple key components of the vehicle body, such as the side outer panel, the B-pillar reinforcement plate, the upper rail reinforcement plate, etc., but also plays a key role in load bearing when the vehicle is subjected to side impact and top compression, directly relating to the safety of the vehicle occupants.
[0003] With the continuous improvement of automobile safety standards and the increasing emphasis of consumers on vehicle safety performance, the performance requirements for the B-pillar upper joint structure are becoming increasingly stringent. At present, the traditional B-pillar upper joint structure has many deficiencies in design and performance. For example, the lap joint method of some structures is unreasonable, resulting in a small lap joint surface, making it difficult for the overall strength and rigidity of the structure to meet the growing safety needs. When the vehicle is subjected to side impact, such a structure is prone to deformation or even breakage, and cannot effectively disperse the impact energy, resulting in poor protection effect for the vehicle occupants. When the vehicle rolls or is subjected to heavy top pressure, the top compression capacity of the traditional structure is insufficient, and the top of the vehicle body is prone to crushing deformation, invading the passenger compartment and causing serious injury to the head and neck of the occupants. CONTENT OF THE INVENTION
[0004] Embodiments of the present application provide a B-pillar upper joint structure and a vehicle, which are used to solve the problems of insufficient side impact performance and top compression strength of an automobile.
[0005] In some embodiments, a B-pillar upper joint structure is provided, which comprises an upper rail reinforcement plate and a B-pillar reinforcement plate, the upper rail reinforcement plate comprises an upper segment lap joint portion and a lower segment lap joint portion which are arranged at intervals along a first direction, the first direction is consistent with the length direction of the B-pillar reinforcement plate, and the upper segment lap joint portion and the lower segment lap joint portion are respectively lap jointed and fixed with the B-pillar reinforcement plate; the upper rail reinforcement plate further comprises a bending portion connected between the upper segment lap joint portion and the lower segment lap joint portion, and a cavity is formed between the bending portion and the B-pillar reinforcement plate.
[0006] In some embodiments, the upper rail reinforcement plate further comprises a rounded lap joint portion arranged on both sides of the lower segment lap joint portion in a second direction, the second direction is not parallel to the first direction, the rounded lap joint portion does not coincide with the plane in which the lower segment lap joint portion is located, and the rounded lap joint portion is lap jointed and fixed with the B-pillar reinforcement plate.
[0007] In some embodiments, the rounded lap joint portion and the plane in which the lower segment lap joint portion is located form a drop h in a third direction, and the third direction is not parallel to the first direction and the second direction.
[0008] In some embodiments, the fall h of the rounded lap joint and the plane where the lower lap joint is located in the third direction is in the range of 15-30 mm.
[0009] In some embodiments, the lower lap joint is welded and fixed to the B-pillar reinforcement plate by at least two rows of welding points.
[0010] In some embodiments, the upper lap joint is welded and fixed to the B-pillar reinforcement plate by at least one row of welding points, and the edge of the B-pillar reinforcement plate that is lap-jointed with the upper lap joint is wavy.
[0011] In some embodiments, the length of the lower lap joint in the second direction gradually decreases in the direction away from the upper lap joint.
[0012] In some embodiments, a side outer panel is further included, the B-pillar reinforcement plate is connected between the side outer panel and the upper rocker reinforcement plate, and the side outer panel is lap-jointed with the upper rocker reinforcement plate.
[0013] In some embodiments, the thickness of the B-pillar reinforcement plate in the area that is lap-jointed with the upper rocker reinforcement plate is increased by Δd, and Δd is in the range of 0.3 mm-0.5 mm.
[0014] In some embodiments, a vehicle is provided, which includes the B-pillar upper joint structure according to any one of the above embodiments.
[0015] In the B-pillar upper joint structure provided by the embodiments of the present application, the upper lap joint and the lower lap joint are arranged apart from each other in the first direction, forming a double support structure. The top pressure is uniformly transmitted to the B-pillar reinforcement plate through the lap joints distributed in the first direction, significantly improving the top pressure load dispersion capability. The upper lap joint and the lower lap joint are connected through the bending part, and the cavity is formed around the bending part and the B-pillar reinforcement plate, i.e., the bending part and the B-pillar reinforcement plate do not need to be fixedly attached to each other. In the assembly process of vehicle manufacturing, a certain tolerance space can be provided for the accurate cooperation of the upper lap joint, the lower lap joint, and the B-pillar reinforcement plate. At the same time, when subjected to impact force, the upper rocker reinforcement plate and the B-pillar reinforcement plate around the cavity will be deformed due to the external force, converting the kinetic energy generated by the collision into deformation energy of the plate material, reducing the impact force transmitted to the vehicle interior, and reducing the risk of injury to the occupants in the vehicle. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0017] Figure 1 is a perspective view of the B-pillar joint structure in some embodiments of the present application;
[0018] Figure 2 is Figure 1 is a schematic view of the overlap relationship between the roof rail reinforcement and the B-pillar reinforcement in an embodiment of the present application;
[0019] Figure 3 is Figure 1 is a schematic view of the positional relationship between the lower overlap portion and the corner overlap portion in an embodiment of the present application;
[0020] Figure 4 is Figure 1 is a schematic view of the overlap area between the lower overlap portion and the B-pillar reinforcement in an embodiment of the present application;
[0021] Figure 5 is Figure 1 is a schematic view of the overlap area between the B-pillar reinforcement and the lower overlap portion in an embodiment of the present application.
[0022] In the above figures:
[0023] 10, roof rail reinforcement; 11, upper overlap portion; 12, lower overlap portion; 13, bent portion; 14, rounded overlap portion; 20, B-pillar reinforcement; 30, outer side panel; 40, weld point; 50, cavity. DETAILED DESCRIPTION
[0024] The present application will be further described below in conjunction with the drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustration of the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only some embodiments of the present application, but not all embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.
[0025] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. The terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or components inherent to the process, method, product or device.
[0026] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a separate or alternative embodiment to the other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with each other.
[0027] The embodiments of the present application provide a vehicle, including a B-pillar upper joint structure, which is installed at the junction of the B-pillar and the roof side of the vehicle, and effectively reduces the intrusion amount of the passenger compartment when the vehicle rolls or side impacts through multi-segment lap joint and cavity 50 energy absorption design. The B-pillar upper joint structure is suitable for vehicles such as fuel cars, gas cars or new energy cars, and the new energy car can be a pure electric car, a hybrid car or an extended range car, and the vehicle can be a front drive vehicle, a rear drive vehicle or a four-wheel drive vehicle.
[0028] Please refer to Figure 1 and Figure 2 , Figure 1 is a perspective view of the B-pillar upper joint structure in some embodiments of the present application, Figure 2 is Figure 1 a schematic view of the lap joint relationship between the upper side beam reinforcement plate 10 and the B-pillar reinforcement plate 20 in the embodiments. The B-pillar upper joint structure includes the upper side beam reinforcement plate 10 and the B-pillar reinforcement plate 20, and the upper side beam reinforcement plate 10 and the B-pillar reinforcement plate 20 are made of high-strength steel material, which has good strength and stamping performance, can meet the strength requirements of the vehicle body structure, and at the same time, the cost control is considered. Figure 1X, Y, Z directions shown in the middle respectively represent the first direction, the second direction and the third direction.
[0029] The upper beam reinforcement plate 10 includes an upper segment lap joint part 11 and a lower segment lap joint part 12 arranged at intervals along the first direction, the first direction being consistent with the length direction of the B pillar reinforcement plate 20, the first direction being substantially the vehicle height direction, the upper segment lap joint part 11 and the lower segment lap joint part 12 being respectively lap-jointed and fixed with the B pillar reinforcement plate 20. The interval distance between the upper segment lap joint part 11 and the lower segment lap joint part 12 is determined according to the body design standard, ensuring accurate alignment when lap-jointed with the B pillar reinforcement plate 20. The upper segment lap joint part 11, the lower segment lap joint part 12 and the B pillar reinforcement plate 20 are connected by a welding process, appropriate welding parameters are selected to ensure welding strength and make the structure stable and reliable. In the embodiment, the upper segment lap joint part 11 and the lower segment lap joint part 12 are arranged at intervals along the first direction, compared with the prior art in which the upper beam reinforcement plate 10 is connected with the B pillar reinforcement plate 20 only through the upper segment lap joint part 11, the lap joint area is increased, forming a double support structure, and the top pressure can be evenly transmitted to the B pillar reinforcement plate 20 through the upper segment lap joint part 11 and the lower segment lap joint part 12 distributed along the first direction, significantly improving the top pressure load dispersion capability.
[0030] In the B pillar upper joint structure provided by the embodiment of the present application, the upper segment lap joint part 11 and the lower segment lap joint part 12 are connected through the bending part 13, and the cavity 50 is formed by the bending part 13 and the B pillar reinforcement plate 20, that is, the bending part 13 and the B pillar reinforcement plate 20 do not need to be fixed together, and in the assembly link of vehicle manufacturing, a certain tolerance space can be provided for the accurate cooperation of the upper segment lap joint part 11, the lower segment lap joint part 12 and the B pillar reinforcement plate 20. At the same time, when subjected to impact force, the upper beam reinforcement plate 10 and the B pillar reinforcement plate 20 around the cavity 50 will be deformed, converting the kinetic energy generated by the collision into deformation energy of the plate material, reducing the impact force transmitted to the vehicle interior, and reducing the risk of injury to the vehicle occupants.
[0031] Optionally, the cavity 50 can be filled with high-elasticity structural glue or energy-absorbing foam material (such as polyurethane). When the vehicle is subjected to top pressure or side collision, the cavity 50 absorbs impact energy by material compression deformation, reduces the stress peak of the structure, and effectively avoids local cracking.
[0032] Please refer to Figure 1 and Figure 3 , Figure 3 is Figure 1The schematic diagram of the position relationship between the lower segment lap joint part 12 and the corner lap joint part in the embodiment. In some embodiments, the second direction of the lower segment lap joint part 12 is provided with a round corner lap joint part 14, the second direction is not parallel to the first direction, and the second direction can be perpendicular to the first direction, for example, the second direction is the vehicle length direction. The round corner lap joint part 14 does not coincide with the plane where the lower segment lap joint part 12 is located, and the round corner lap joint part 14 is lap jointed and fixed with the B-pillar reinforcement plate 20.
[0033] The round corner lap joint part 14 and the plane where the lower segment lap joint part 12 is located form a drop h in the third direction, the third direction is not parallel to the first direction and the second direction, and specifically, the third direction can be perpendicular to the first direction and the second direction, for example, the third direction is the vehicle width direction. Through the design of the drop h, a three-dimensional stable connection structure can be formed, the impact force is guided to transmit along different planes when the vehicle suffers side impact, the stress is dispersed, the impact resistance of the structure is improved, and more reliable safety protection is provided for the passengers in the vehicle.
[0034] The drop h of the round corner lap joint part 14 and the plane where the lower segment lap joint part 12 is located in the third direction is 15-30 mm. Exemplarily, the drop h can be 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm or 30 mm, which is not specifically limited here.
[0035] Further, the lower segment lap joint part 12 is welded and fixed with the B-pillar reinforcement plate 20 through at least two rows of welding points 40. More specifically, the distance between each row of welding points 40 is 20-30 mm, and the diameter of the welding point 40 is 5-6 mm. The two rows of welding points 40 are staggered and distributed in a “plum blossom shape” layout, so that the load transmission path is more uniform and the connection strength is improved. Before welding, the surface of the welding part is treated to remove impurities and oil stains, and the welding quality is improved. During welding, appropriate welding equipment and parameters such as welding current, voltage and welding time are selected, and the automatic welding equipment is used to ensure that the two rows of welding points 40 are uniformly distributed and the distance between the welding points 40 is consistent. Through tension test and non-destructive test, it is ensured that the welding strength meets the design requirements, so that the lower segment lap joint part 12 and the B-pillar reinforcement plate 20 are tightly connected and jointly bear various loads during vehicle driving.
[0036] Please refer to Figure 1 In some embodiments, the edge of the B-pillar reinforcement plate 20 that is lap jointed with the upper segment lap joint part 11 is in a wave shape. The height difference between the wave crest and the wave trough is 3-5 mm. The wave-shaped edge is connected with the upper segment lap joint part 11 through at least one row of welding points 40. The wave-shaped design increases the lap joint contact area by about 20%, and the welding points 40 are arranged along the wave crest to optimize the load distribution and avoid stress concentration at the edge.
[0037] Referring to Figure 4 and Figure 5 , Figure 4 As Figure 1 Figure 2 is a schematic view of the overlapping area between the lower overlapping part 12 and the B-pillar reinforcing plate 20 in the embodiment. Figure 5 As Figure 1 Figure 3 is a schematic view of the overlapping area between the B-pillar reinforcing plate 20 and the lower overlapping part 12 in the embodiment. Figure 4 and Figure 5 The shaded parts in Figures 2 and 3 are the overlapping and fitting areas between the lower overlapping part 12 and the B-pillar reinforcing plate 20. In some embodiments, the length of the lower overlapping part 12 in the second direction gradually decreases in the direction away from the upper overlapping part 11, forming a trapezoidal structure. This design makes the contact area between the lower overlapping part 12 and the B-pillar reinforcing plate 20 decrease from the upper part to the lower part, which is consistent with the mechanical characteristics of the gradually decreasing top pressure, achieving the balance between material lightness and strength. Through the gradient design of the shape of the lower overlapping part 12, the structural stress distribution is optimized. When subjected to forces from different directions during vehicle driving, the lower overlapping part 12 can more reasonably transmit the forces to the B-pillar reinforcing plate 20, improving the overall performance and stability of the structure.
[0038] Referring to Figure 2 In some embodiments, the B-pillar upper joint structure further includes a side outer panel 30, the B-pillar reinforcing plate 20 is connected between the side outer panel 30 and the upper rail reinforcing plate 10, and the side outer panel 30 overlaps with the upper rail reinforcing plate 10. When installing the side outer panel 30, a combination of welding and riveting can be used for connection, welding is used in key parts to ensure connection strength, and riveting is used in some parts that need to be cushioned to improve the flexibility of the structure. After connection is completed, sealing and strength detection are performed to ensure that the side outer panel 30 and other parts form a stable overall structure, improving the rigidity and safety of the vehicle body.
[0039] In some embodiments, the thickness of the B-pillar reinforcing plate 20 increases by Δd in the area overlapping with the upper rail reinforcing plate 10, Δd = 0.3-0.5 mm, and Δd can be specifically 0.3 mm, 0.4 mm, or 0.5 mm, which is not limited here. The thickened area is realized by a local hot stamping process, the thickness gradient transitions smoothly, avoiding fatigue cracks caused by sudden thickness changes, and significantly improving the strength, so that the vehicle can better withstand impact forces when subjected to a collision, ensuring the integrity of the vehicle body structure and the safety of the passengers inside the vehicle.
[0040] The above only describes some embodiments of the present application, and does not limit the protection scope of the present application, and any equivalent device or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A B-pillar connector structure, characterized in that, The upper side beam reinforcing plate comprises an upper segment lap joint portion and a lower segment lap joint portion which are arranged at intervals along a first direction, the first direction being consistent with the length direction of the B pillar reinforcing plate, and the upper segment lap joint portion and the lower segment lap joint portion are respectively lap jointed and fixed with the B pillar reinforcing plate; The upper side beam reinforcing plate further comprises a bending portion which is connected between the upper segment lap joint portion and the lower segment lap joint portion, and a cavity is enclosed between the bending portion and the B pillar reinforcing plate.
2. The B-pillar upper joint structure according to claim 1, characterized by The upper side beam reinforcing plate further comprises a round corner lap joint portion which is arranged on both sides of the lower segment lap joint portion along a second direction, the second direction being non-parallel to the first direction, the round corner lap joint portion is non-coincident with the plane where the lower segment lap joint portion is located, and the round corner lap joint portion is lap jointed and fixed with the B pillar reinforcing plate.
3. The B-pillar upper joint structure according to claim 2, characterized by The plane where the round corner lap joint portion and the lower segment lap joint portion are located forms a drop h in a third direction, the third direction being non-parallel to the first direction and the second direction.
4. The B-pillar upper joint structure according to claim 3, characterized by The drop h of the plane where the round corner lap joint portion and the lower segment lap joint portion are located in the third direction is in the range of 15-30 mm.
5. The B-pillar upper joint structure according to any one of claims 1 to 4, characterized in that, The lower segment lap joint portion is welded and fixed with the B pillar reinforcing plate through at least two rows of welding points.
6. The B-pillar upper joint structure according to any one of claims 1 to 4, characterized in that, The upper segment lap joint portion is welded and fixed with the B pillar reinforcing plate through at least one row of welding points, and the edge of the B pillar reinforcing plate which is lap jointed with the upper segment lap joint portion is in a wave shape.
7. The B-pillar upper joint structure according to claim 3 or 4, characterized by The length of the lower segment lap joint portion in the second direction gradually decreases in the direction away from the upper segment lap joint portion.
8. The B-pillar upper joint structure according to any one of claims 1 to 4, characterized in that, The side outer panel is further included, the B pillar reinforcing plate is connected between the side outer panel and the upper side beam reinforcing plate, and the side outer panel is lap jointed with the upper side beam reinforcing plate.
9. The B-pillar upper joint structure according to any one of claims 1 to 4, characterized in that, The thickness of the B pillar reinforcing plate in the area which is lap jointed with the upper side beam reinforcing plate is increased by Δd, and the value of Δd is in the range of 0.3 mm-0.5 mm.
10. A vehicle characterized by comprising: The B pillar upper joint structure comprises the B pillar upper joint structure as claimed in any one of claims 1-9.