A vehicle body B-pillar upper reinforcement component

Abstract

The present invention discloses a vehicle body B-pillar upper reinforcement assembly, comprising a B-pillar inner plate, a top beam, a B-pillar connecting plate, an upper side beam inner plate and an A-pillar upper reinforcement plate, wherein the side edge of the upper side beam inner plate extends transversely and is fixed on the inner side of the upper end of the B-pillar inner plate, the lower end of the B-pillar connecting plate is fixed on the outer side of the corresponding upper end of the B-pillar inner plate, and the middle of the B-pillar connecting plate is provided with a protruding portion protruding inward, and the inner outer surface of the protruding portion and the corresponding upper side beam inner plate outer surface, the corresponding A-pillar upper reinforcement plate outer surface and the corresponding top beam outer surface are surrounded by a closed cavity structure. The vehicle body B-pillar upper reinforcement assembly of the present invention effectively solves the problem of unsmooth path between the load transferred to the upper end of the B-pillar assembly and the top beam during a side collision, ensures a smooth load transfer path, and the cavity structure helps to disperse the load, avoids large deformation of the vehicle body caused by force concentration, thereby causing large deformation of the upper side beam area of ​​the vehicle body side door, making it difficult to open the door, affecting the rescue of people in the vehicle.

Description

Technical Field

[0001] The invention relates to a reinforcing assembly connected to a vehicle body B-pillar, in particular to an upper reinforcing assembly of a vehicle body B-pillar for reinforcing the upper connection strength of the B-pillar. Background Art

[0002] The B-pillar structure of the vehicle body plays a key role in the torsional stiffness and safe collision of the vehicle body, especially in the side collision safety. In the torsional condition of the vehicle body, the B-pillar structure affects the deformation of the vehicle body, and plays a role in reasonably absorbing the collision energy and protecting the safety of the occupants in the frontal collision, offset collision and side collision. The traditional B-pillar structure has the following problems:

[0003] 1. As Figure 1 and Figure 2 As shown, the end of the top beam 1' of the traditional structure is fixed on the upper side beam inner plate 2', the upper end of the B-pillar inner plate 3' and the end of the top beam 1' are offset, and the top beam 1' is fixed on the upper end of the top cover 4'. When there is a load, the load transmission path is not smooth, the output force is concentrated, and the body deformation is concentrated, which endangers the personal safety of the occupants. In addition, there is no connection and fixation between the top beam 1' and the B-pillar inner plate 3' and the B-pillar cavity, only spot welding in the top trim area, and the connection strength is not strong.

[0004] 2. If Figure 2 and Figure 3 As shown, the upper end of the B-pillar reinforcement plate 5' of the conventional structure is not connected to the A-pillar upper reinforcement plate 6', and the right end of the A-pillar upper reinforcement plate 6' is Figure 3 The left end of the A-pillar upper reinforcement plate 6' is connected to the upper end of the A-pillar lower reinforcement plate 7', and the side panel outer panel 8' is fixed to the B-pillar reinforcement plate 5' and the upper side beam inner panel. There is no reinforcement plate support in the rear door area, which causes a large deformation of the vehicle body during a side collision, making it impossible to open the rear door, making it impossible for the rear passengers to escape in the collision accident. Summary of the invention

[0005] The present invention is completed to solve the deficiencies in the prior art. The purpose of the present invention is to provide a vehicle body B-pillar upper reinforcement component that effectively solves the problem of unsmooth path between the load transferred to the upper end of the B-pillar assembly and the top beam during a side collision, ensures a smooth load transfer path, helps to disperse the load, avoids large deformation of the vehicle body caused by force concentration, thereby causing large deformation of the upper side beam area of ​​the vehicle body side door, making the door difficult to open, and affecting the rescue of people in the car.

[0006] The vehicle body B-pillar upper reinforcement assembly of the present invention comprises a B-pillar inner plate, a top beam, a B-pillar connecting plate, an upper side beam inner plate and an A-pillar upper reinforcement plate, wherein the side edge portion of the upper side beam inner plate extends transversely and is fixed to the inner side of the upper end portion of the B-pillar inner plate, the A-pillar upper reinforcement plate extends transversely and is fixed to the inner side of the upper side beam inner plate, the top beam is longitudinally fixed to the top cover, the top beam end is fixed to the upper end portion of the B-pillar inner plate, the upper end portion of the B-pillar connecting plate is fixed to the corresponding top beam head, the lower end portion of the B-pillar connecting plate is fixed to the outer side of the upper end portion of the B-pillar inner plate, the middle portion of the B-pillar connecting plate is provided with a convex portion protruding inwardly, the inner outer surface of the convex portion and the corresponding outer surface of the upper side beam inner plate, the corresponding outer surface of the A-pillar upper reinforcement plate and the corresponding outer surface of the top beam are surrounded by a closed cavity structure, and the side outer panel is fixed to the upper side beam inner plate, the B-pillar connecting plate and the outer side of the B-pillar inner plate.

[0007] A vehicle body B-pillar upper reinforcement assembly of the present invention may also be:

[0008] The B-pillar connecting plate is provided with reinforcing ribs extending from top to bottom.

[0009] Reinforcement parts are respectively extended on the left and right sides of the B-pillar connecting plate, and the left and right sides of the B-pillar connecting plate are respectively fixed to the corresponding left and right sides of the top beam head, the corresponding left and right sides of the upper side beam inner plate and the corresponding left and right sides of the upper end of the B-pillar inner plate through the reinforcement parts.

[0010] The reinforcing parts are flanges extending downwards, and the left and right sides of the B-pillar connecting plate are fixed to the corresponding left and right sides of the top beam head, the corresponding left and right sides of the upper side beam inner plate and the corresponding left and right sides of the upper end of the B-pillar inner plate through the flanges.

[0011] The upper end of the B-pillar connecting plate is fixed to the corresponding top beam head by bolts.

[0012] A projection welding nut is sleeved on the bolt, and the upper end of the B-pillar connecting plate is fixed to the top beam head through the bolt and the projection welding nut.

[0013] There are two bolts, and the upper end of the B-pillar connecting plate is fixed to the top beam head by the two bolts arranged horizontally.

[0014] The lower end of the B-pillar connecting plate is fixed to the corresponding upper end of the B-pillar inner plate and the corresponding side edge of the roof beam inner plate by spot welding.

[0015] A B-pillar reinforcement plate is provided on the inner side of the B-pillar inner plate, the upper end of the B-pillar reinforcement plate is fixed to the corresponding side edge of the A-pillar upper reinforcement plate, the head of the A-pillar upper reinforcement plate is fixed to the upper end of the A-pillar lower reinforcement plate, and the tail of the A-pillar lower reinforcement plate is fixed to the upper end of the C-pillar reinforcement plate.

[0016] The vehicle body B-pillar upper reinforcement assembly of the present invention comprises a B-pillar inner plate, a top beam, a B-pillar connecting plate, an upper side beam inner plate and an A-pillar upper reinforcement plate, wherein the side edge portion of the upper side beam inner plate extends transversely and is fixed to the inner side of the upper end portion of the B-pillar inner plate, the A-pillar upper reinforcement plate extends transversely and is fixed to the inner side of the upper side beam inner plate, the top beam is longitudinally fixed to the top cover, the top beam end is fixed to the upper end portion of the B-pillar inner plate, the upper end portion of the B-pillar connecting plate is fixed to the corresponding top beam head, the lower end portion of the B-pillar connecting plate is fixed to the outer side of the upper end portion of the B-pillar inner plate, the middle portion of the B-pillar connecting plate is provided with a convex portion protruding inwardly, the inner outer surface of the convex portion and the corresponding outer surface of the upper side beam inner plate, the corresponding outer surface of the A-pillar upper reinforcement plate and the corresponding outer surface of the top beam are surrounded by a closed cavity structure, and the side outer panel is fixed to the upper side beam inner plate, the B-pillar connecting plate and the outer side of the B-pillar inner plate. In this way, the upper end of the B-pillar inner panel and the head of the top beam are designed relative to each other, and a B-pillar connecting plate is fixed between the head of the top beam and the corresponding upper end of the B-pillar inner panel. The top beam and the B-pillar inner panel are connected by the B-pillar connecting plate. When a side collision occurs, the load is transferred to the top beam through the upper end of the B-pillar inner panel, and then transferred to the other side of the vehicle body through the top beam, ensuring a smooth load transfer path, helping to disperse the load, avoiding large deformation of the vehicle body due to concentrated force, causing large deformation in the upper side beam area of ​​the side door of the vehicle body, making it difficult to open the door, affecting the rescue of people in the vehicle. In addition, a protruding portion is provided in the middle of the B-pillar connecting plate, with the inner side pointing to the outside of the vehicle. The inner outer surface of the protruding portion forms a closed cavity structure with the outer surface of the inner plate of the upper side beam, the outer surface of the upper reinforcement plate of the A-pillar and the corresponding outer surface of the top beam. On the one hand, the point connection between the upper end of the B-pillar inner plate and the head of the top beam is enhanced to a cavity structure connection, which greatly improves the cross-sectional size of the upper end joint of the B-pillar inner plate and extends the transition distance of the upper end of the B-pillar inner plate, thereby effectively improving the overall upper end joint strength of the B-pillar and the torsional stiffness of the vehicle. On the other hand, the interior of the cavity structure is air, and there is no solid structure to block the transfer of load. When a side collision occurs, the load passes through the cavity structure along the upper end of the B-pillar inner plate to accelerate the transfer of load, further avoiding load stress concentration and endangering the safety of passengers. The advantages of the upper reinforcement assembly of the B-pillar of the vehicle body of the present invention over the prior art are: it effectively solves the problem of the load being transferred to the upper end of the inner plate of the B-pillar and the path of the top beam being not smooth during a side collision, ensures that the load transfer path is smooth, and the increase of the cavity structure helps to disperse the load, avoids large deformation of the vehicle body caused by force concentration, thereby causing large deformation in the upper side beam area of ​​the side door of the vehicle body, making it difficult to open the door, affecting the rescue of people in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the connection structure between the upper end of the B-pillar inner plate and the end of the top beam in the prior art of the vehicle body B-pillar upper reinforcement assembly.

[0018] Figure 2 yes Figure 1 Middle AA cross section.

[0019] Figure 3 yes Figure 1 Schematic diagram of the structure of the upper end of the middle B-pillar reinforcement plate and the upper reinforcement plate of the A-pillar.

[0020] Figure 4 It is a schematic diagram of the connection structure between the upper end of the B-pillar inner plate and the end of the top beam in the vehicle body B-pillar upper reinforcement assembly of the present invention.

[0021] Figure 5 yes Figure 4 Middle BB cross section.

[0022] Figure 6 yes Figure 4 Enlarged view of the middle B-pillar connecting plate.

[0023] Figure 7 yes Figure 6 Cross-sectional view of the middle B-pillar connecting plate GG.

[0024] Figure 8 It is a schematic structural diagram of a B-pillar reinforcement plate and an A-pillar upper reinforcement plate in a vehicle body B-pillar upper reinforcement assembly of the present invention.

[0025] Fig. 9 It is an exploded view of the vehicle body B-pillar upper reinforcement assembly of the present invention.

[0026] Description of Figure Number

[0027] 1…Top beam 2…Upper side beam inner panel 3…B-pillar inner panel

[0028] 4…B-pillar connecting plate 5…A-pillar upper reinforcement plate 6…protrusion

[0029] 7…Cavity structure 8…Side panel 9…Reinforced ribs

[0030] 10…Reinforcement 11…Bolt 12…Projection welding nut

[0031] 13… Spot welding 14… B-pillar reinforcement plate 15… A-pillar lower reinforcement plate

[0032] 16…C-pillar reinforcement plate 17…Top cover DETAILED DESCRIPTION

[0033] The following is combined with the attached drawings Figures 4 to 9 A vehicle body B-pillar upper reinforcement assembly of the present invention is further described in detail.

[0034] The present invention is a vehicle body B-pillar upper reinforcement assembly, please refer to Figures 4 to 9As shown, it includes a B-pillar inner panel 3, a top beam 1, a B-pillar connecting plate 4, an upper side beam inner panel 2 and an A-pillar upper reinforcement plate 5, the side edge of the upper side beam inner panel 2 extends transversely and is fixed to the inner side of the upper end of the B-pillar inner panel 3, the A-pillar upper reinforcement plate 5 extends transversely and is fixed to the inner side of the upper side beam inner panel 2, the top beam 1 is longitudinally fixed to the top cover 17, the end of the top beam 1 is fixed to the upper end of the B-pillar inner panel 3, the upper end of the B-pillar connecting plate 4 is fixed to the corresponding head of the top beam 1, the lower end of the B-pillar connecting plate 4 is fixed to the outer side of the corresponding upper end of the B-pillar inner panel 3, the middle part of the B-pillar connecting plate 4 is provided with a raised portion 6 protruding inwardly, the inner outer surface of the raised portion 6 and the corresponding outer surface of the upper side beam inner panel 2, the corresponding outer surface of the A-pillar upper reinforcement plate 5 and the corresponding outer surface of the top beam 1 are surrounded by a closed cavity structure 7, and a side outer panel 8 is fixed to the upper side beam inner panel 2, the B-pillar connecting plate 4 and the outer side of the B-pillar inner panel 3. Specifically, the upper end of the B-pillar inner panel 3 is designed to be relative to the head of the top beam 1, and a B-pillar connecting plate 4 is fixed between the head of the top beam 1 and the corresponding upper end of the B-pillar inner panel 3. The top beam 1 and the B-pillar inner panel 3 are connected by the B-pillar connecting plate 4. When a side collision occurs, the load is transferred to the top beam 1 through the upper end of the B-pillar inner panel 3, and then transferred to the other side of the vehicle body through the top beam 1, ensuring a smooth load transfer path and facilitating load dispersion, avoiding large deformation of the vehicle body caused by concentrated force, causing large deformation in the upper side beam area of ​​the side door of the vehicle body, making it difficult to open the door, affecting the rescue of people in the vehicle. In addition, a raised portion 6 is provided in the middle of the B-pillar connecting plate 4, with the inner side pointing to the outside of the vehicle. The inner outer surface of the raised portion 6 forms a closed cavity structure 7 with the outer surface of the upper side beam inner plate 2, the outer surface of the A-pillar upper reinforcing plate 5 and the corresponding outer surface of the top beam 1. On the one hand, the point connection between the upper end of the B-pillar inner plate 3 and the head of the top beam 1 is enhanced to be connected with the cavity structure 7, which greatly improves the cross-sectional size of the upper end joint of the B-pillar inner plate 3 and extends the transition distance of the upper end of the B-pillar inner plate 3, thereby effectively improving the overall upper end joint strength of the B-pillar and the torsional stiffness of the vehicle. On the other hand, the interior of the cavity structure 7 is air, and there is no solid structure to block the transfer of load. When a side collision occurs, the load passes through the cavity structure 7 along the upper end of the B-pillar inner plate 3 to accelerate the transfer of load, further avoiding load stress concentration and endangering the safety of passengers. Compared with the prior art, the advantages are: it effectively solves the problem of the non-smooth path between the load transferred to the upper end of the B-pillar inner panel 3 and the top beam 1 during a side collision, ensures a smooth load transfer path, and adds a cavity structure 7 to help disperse the load, avoiding large deformation of the body caused by force concentration, thereby causing large deformation of the upper side beam area of ​​the side door of the body, making it difficult to open the door, affecting the rescue of people in the car.

[0035] The present invention is a vehicle body B-pillar upper reinforcement assembly, please refer to Figures 4 to 9As shown, based on the technical solution described above, the B-pillar connecting plate 4 may also be provided with a reinforcing concave rib 9 extending from top to bottom. In this way, by providing the reinforcing concave rib 9 on the B-pillar connecting plate 4 extending from the upper end of the B-pillar connecting plate 4 to the lower end of the B-pillar connecting plate 4, the connection strength of the B-pillar connecting plate 4 is strengthened. The reinforcing concave rib 9 may be provided in the middle of the B-pillar connecting plate 4, extending from the middle upper end of the B-pillar connecting plate 4 to the middle lower end of the B-pillar connecting plate 4, as shown in FIG. Figure 7 As shown, the horizontal cross section of the B-pillar connecting plate 4 is in the shape of an inverted "bow". Of course, the reinforcing concave rib 9 can also extend upward from the lower left end or the lower right end of the B-pillar connecting plate 4 to the corresponding upper left end or the upper right end.

[0036] The present invention is a vehicle body B-pillar upper reinforcement assembly, please refer to Figures 4 to 9 As shown, on the basis of the technical scheme described above, it can also be that: the left and right sides of the B-pillar connecting plate 4 are respectively extended with a reinforcing part 10, and the left and right sides of the B-pillar connecting plate 4 are respectively fixed to the left and right sides of the corresponding head of the top beam 1, the left and right sides of the corresponding upper side beam inner plate 2, and the left and right sides of the upper end of the B-pillar inner plate 3 through the reinforcing part 10. In this way, by arranging the reinforcing part 10 on the left and right sides of the B-pillar connecting plate 4, the connection strength of the left and right sides of the B-pillar connecting plate 4 and the left and right sides of the corresponding head of the top beam 1, the left and right sides of the upper side beam inner plate 2, and the left and right sides of the upper end of the B-pillar inner plate 3 is strengthened. Further strengthen the connection strength. On the basis of the previous technical scheme, a further preferred technical scheme is that: the reinforcing part 10 is respectively a flange extending downward, and the left and right sides of the B-pillar connecting plate 4 are respectively fixed to the left and right sides of the corresponding head of the top beam 1, the left and right sides of the corresponding upper side beam inner plate 2, and the left and right sides of the upper end of the B-pillar inner plate 3 through the flange. In this way, the flange has good connection strength, and the flange extending downward is used as the reinforcement part 10, which further ensures the connection strength between the left and right sides of the B-pillar connecting plate 4 and the corresponding left and right sides of the end of the top beam 1, the left and right sides of the upper side beam inner plate 2 and the left and right sides of the upper end of the B-pillar.

[0037] The present invention is a vehicle body B-pillar upper reinforcement assembly, please refer to Figures 4 to 9As shown, on the basis of the technical scheme described above, it can also be that: the upper end of the B-pillar connecting plate 4 is fixed to the corresponding head of the top beam 1 by a bolt 11. In this way, the upper end of the B-pillar connecting plate 4 is connected and fixed to the head of the top beam 1 by the bolt 11, and the top beam 1 is longitudinally fixed to the vehicle body roof 17, effectively ensuring the connection strength. A further preferred technical scheme based on the previous technical scheme is: a projection welding nut 12 is sleeved on the bolt 11, and the upper end of the B-pillar connecting plate 4 is fixed to the head of the top beam 1 by the bolt 11 and the projection welding nut 12. In this way, the top beam 1 and the upper end of the B-pillar connecting plate 4 are fixedly connected by the bolt 11 and the projection welding nut 12, further strengthening the connection strength. Of course, in addition to the fixing method of the projection welding nut 12 and the bolt 11, other fixing methods are also included, such as fixing by welding. On the basis of the previous technical scheme, it can also be that: there are two bolts 11, and the upper end of the B-pillar connecting plate 4 is fixed to the head of the top beam 1 by two bolts 11 arranged horizontally. In this way, the two bolts 11 are fixedly connected, further strengthening the connection strength.

[0038] The present invention is a vehicle body B-pillar upper reinforcement assembly, please refer to Figures 4 to 9 As shown, on the basis of the technical solution described above, it can also be that: the lower end of the B-pillar connecting plate 4 is fixed to the corresponding upper end of the B-pillar inner plate 3 and the corresponding side edge of the upper side beam inner plate 2 by spot welding. In this way, the lower end of the B-pillar connecting plate 4 is fixed to the upper end of the B-pillar inner plate 3 and the side edge of the upper side beam inner plate 2 by spot welding, ensuring the connection strength between the lower end of the B-pillar connecting plate 4 and the upper end of the B-pillar inner plate 3 and the upper side beam inner plate 2.

[0039] The present invention is a vehicle body B-pillar upper reinforcement assembly, please refer to Figures 4 to 9As shown, based on the technical solution described above, it can also be that: a B-pillar reinforcement plate 14 is provided on the inner side of the B-pillar inner plate 3, the upper end of the B-pillar reinforcement plate 14 is fixed to the corresponding side of the A-pillar upper reinforcement plate 5, the head of the A-pillar upper reinforcement plate 5 is fixed to the upper end of the A-pillar lower reinforcement plate 15, and the rear end of the A-pillar lower reinforcement plate 15 is fixed to the upper end of the C-pillar reinforcement plate 16. The upper end of the B-pillar reinforcement plate 14 is fixedly connected to the A-pillar upper reinforcement plate 5, the A-pillar upper reinforcement plate 5 extends to the A-pillar lower reinforcement plate 15 on the front side and is fixed to the upper end of the A-pillar lower reinforcement plate 15, the A-pillar upper reinforcement plate 5 extends to the C-pillar reinforcement plate 16 on the rear side and is fixed to the upper end of the C-pillar reinforcement plate 16, and a smooth load transmission path is formed among the B-pillar reinforcement plate 14, the A-pillar upper reinforcement plate 5, the A-pillar lower reinforcement plate 15 and the C-pillar reinforcement plate 16, and the A-pillar upper reinforcement plate 5 not only covers and connects the B-pillar area of ​​the vehicle body, but also has a connection relationship with the C-pillar area of ​​the rear side door vehicle body, and the A-pillar upper reinforcement plate 5, the A-pillar lower reinforcement plate 15, the B-pillar reinforcement plate 14 and the C-pillar reinforcement plate 16 form a reliable reinforcement chain of the vehicle body side wall, which ensures the strength of the front and rear side wall areas, effectively reduces the deformation of the vehicle body, ensures that the front and rear side doors can be opened when a collision occurs, and improves the collision safety.

[0040] The above only describes several specific embodiments of the present invention, but cannot be regarded as the protection scope of the present invention. Any equivalent changes or modifications or proportional enlargement or reduction made according to the design spirit of the present invention should be considered to fall within the protection scope of the present invention.

Claims

1. A vehicle body B-pillar upper reinforcement assembly, characterized in that: The vehicle comprises a B-pillar inner plate (3), a top beam (1), a B-pillar connecting plate (4), an upper side beam inner plate (2) and an A-pillar upper reinforcing plate (5), wherein the side edge of the upper side beam inner plate (2) is transversely extended and fixed to the outer side of the upper end of the B-pillar inner plate (3), the A-pillar upper reinforcing plate (5) is transversely extended and fixed to the outer side of the upper side beam inner plate (2), the top beam (1) is longitudinally fixed to the top cover (17), the end of the top beam (1) is fixed to the upper end of the B-pillar inner plate (3), the upper end of the B-pillar connecting plate (4) is fixed to the corresponding top beam inner plate (3), and the upper end of the B-pillar connecting plate (4) is fixed to the corresponding top beam inner plate (3). The head of the beam (1) is fixed, the lower end of the B-pillar connecting plate (4) is fixed to the inner side of the upper end of the corresponding B-pillar inner plate (3), the middle of the B-pillar connecting plate (4) is provided with a protruding portion (6) protruding inwardly, the inner outer surface of the protruding portion (6) and the corresponding outer surface of the upper side beam inner plate (2), the corresponding outer surface of the A-pillar upper reinforcement plate (5) and the corresponding outer surface of the top beam (1) are surrounded by a closed cavity structure (7), and the side outer plate (8) is fixed to the upper side beam inner plate (2) and the B-pillar connecting plate (4). and the outer side of the B-pillar inner plate (3); the left and right sides of the B-pillar connecting plate (4) are respectively extended with reinforcement parts (10); the left and right sides of the B-pillar connecting plate (4) are respectively fixed to the left and right sides of the corresponding head of the top beam (1), the left and right sides of the corresponding upper side beam inner plate (2) and the left and right sides of the upper end of the B-pillar inner plate (3) through the reinforcement parts (10); the B-pillar connecting plate (4) is provided with reinforcement concave ribs (9) extending from top to bottom; the reinforcement parts (10) are respectively flanges extending downward, and the B-pillar The left and right sides of the connecting plate (4) are respectively fixed to the left and right sides of the corresponding head of the top beam (1), the left and right sides of the corresponding upper side beam inner plate (2) and the left and right sides of the upper end of the corresponding B-pillar inner plate (3) through the flanges; the lower end of the B-pillar connecting plate (4) is fixed to the upper end of the corresponding B-pillar inner plate (3) and the side of the corresponding upper side beam inner plate (2) by spot welding (13); wherein the side close to the side outer plate (8) is the outer side, and the side away from the side outer plate (8) is the inner side.

2. A vehicle body B-pillar upper reinforcement assembly according to any one of claims 1, characterized in that: The upper end of the B-pillar connecting plate (4) is fixed to the corresponding head of the top beam (1) via a bolt (11).

3. The vehicle body B-pillar upper reinforcement assembly according to claim 2, characterized in that: A projection welding nut (12) is sleeved on the bolt (11), and the upper end of the B-pillar connecting plate (4) is fixed to the head of the top beam (1) via the bolt (11) and the projection welding nut (12).

4. The vehicle body B-pillar upper reinforcement assembly according to claim 2, characterized in that: There are two bolts (11), and the upper end of the B-pillar connecting plate (4) is fixed to the head of the top beam (1) by means of the two bolts (11) arranged horizontally.

5. The vehicle body B-pillar upper reinforcement assembly according to any one of claims 1, characterized in that: A B-pillar reinforcement plate (14) is provided on the outer side of the B-pillar inner plate (3); the upper end of the B-pillar reinforcement plate (14) is fixed to the corresponding side edge of the A-pillar upper reinforcement plate (5); the head of the A-pillar upper reinforcement plate (5) is fixed to the upper end of the A-pillar lower reinforcement plate (15); and the rear of the A-pillar upper reinforcement plate (5) is fixed to the upper end of the C-pillar reinforcement plate (16).

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