Column A, vehicle body front structure and vehicle

Abstract

The invention relates to an A column, a vehicle body front structure and a vehicle, the A column comprises an A column outer plate, an A column inner plate, an upper hinge reinforcing plate and a lower hinge reinforcing plate, the A column outer plate is connected to the outer side of the A column inner plate, and the A column inner plate comprises an A column upper inner plate and an A column lower inner plate connected to the lower end of the A column upper inner plate; the upper hinge reinforcing plate is fixedly connected between the A-column upper inner plate and the A-column outer plate, and the lower hinge reinforcing plate is fixedly connected between the A-column lower inner plate and the A-column outer plate; the A-pillar upper inner plate is provided with an induction groove, the induction groove is located in the front portion or the middle portion of the A-pillar upper inner plate in the front-back direction of the vehicle, and when collision force of the vehicle is transmitted to the A-pillar upper inner plate from front to back, the induction groove can guide the A-pillar upper inner plate to deform in the front-back direction of the vehicle. Therefore, full deformation and energy absorption of the front portion of the A column can be achieved during small-offset collision, the rear portion of the A column is kept free of deformation or small in deformation, and therefore the small-offset collision performance of the vehicle is better improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle bodies, and particularly relates to an A-pillar, a front body structure, and a vehicle. Background Art

[0002] In the new regulations of the 2023 version of the China Insurance Vehicle Safety Index (C-IASI), a small overlap (25% overlap) collision is newly added as a mandatory test item. Compared with the 2020 version of C-IASI, the collision requirements for the vehicle body structure are further improved. In a small overlap collision, the local part of the vehicle longitudinal beam participates or does not participate in the collision deformation and energy absorption, and mainly relies on the A-pillar, the sill, and the deformation of the occupant compartment to absorb the collision energy.

[0003] Therefore, the design of the A-pillar is crucial for improving the small overlap collision performance of the vehicle. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an A-pillar, a front body structure, and a vehicle to improve the small overlap collision performance of the vehicle.

[0005] To solve the above technical problem, on the one hand, an embodiment of the present invention provides an A-pillar, which includes an outer A-pillar panel, an inner A-pillar panel, an upper hinge reinforcement plate, and a lower hinge reinforcement plate. The outer A-pillar panel is connected to the outside of the inner A-pillar panel to form a cavity therebetween. The inner A-pillar panel includes an upper inner A-pillar panel and a lower inner A-pillar panel connected to the lower end of the upper inner A-pillar panel;

[0006] The upper hinge reinforcement plate and the lower hinge reinforcement plate are located in the cavity. The upper hinge reinforcement plate is fixedly connected between the upper inner A-pillar panel and the outer A-pillar panel, and the lower hinge reinforcement plate is fixedly connected between the lower inner A-pillar panel and the outer A-pillar panel;

[0007] An induction groove extending in the vertical direction is provided on the upper inner A-pillar panel. The induction groove is located in the front or middle part of the upper inner A-pillar panel in the vehicle front-rear direction. The included angle between the length direction of the induction groove and the vehicle vertical direction is 0-15 degrees. When the collision force of the vehicle is transmitted from front to back to the upper inner A-pillar panel, the induction groove can guide the upper inner A-pillar panel to deform in the vehicle front-rear direction.

[0008] Optionally, the induction groove is recessed from the inner surface of the upper inner A-pillar panel towards the outer A-pillar panel.

[0009] Optionally, the width of the induction groove is greater than or equal to 12 mm.

[0010] Optionally, the upper hinge reinforcement plate and the upper inner A-pillar panel are connected at a first position by a first fastener;

[0011] The lower hinge reinforcement plate and the lower inner A-pillar panel are connected at a second position by a second fastener;

[0012] An underbody cross beam of the front bulkhead is provided on the inner side of the lower inner panel of the A-pillar. The upper front end of the lower hinge reinforcement plate, the lower inner panel of the A-pillar, and the underbody cross beam of the front bulkhead are connected at a third position by a third fastener.

[0013] A moment box is provided on the inner side of the lower inner panel of the A-pillar. The lower front end of the lower hinge reinforcement plate, the lower inner panel of the A-pillar, and the moment box are connected at a fourth position by a fourth fastener.

[0014] Optionally, the upper hinge reinforcement plate and the upper inner panel of the A-pillar are double-layered and superimposed at a first position. The first fastener is a bolt, and the first position is close to the upper end of the lower inner panel of the A-pillar.

[0015] Optionally, the lower hinge reinforcement plate and the lower inner panel of the A-pillar are double-layered and superimposed at a second position. The second fastener is a bolt, and the second position is close to the lower end of the upper inner panel of the A-pillar.

[0016] Optionally, the upper front end of the lower hinge reinforcement plate, the lower inner panel of the A-pillar, and the underbody cross beam of the front bulkhead are triple-layered and superimposed at a third position. The third fastener is a bolt.

[0017] Optionally, the lower front end of the lower hinge reinforcement plate, the lower inner panel of the A-pillar, and the moment box are triple-layered and superimposed at a fourth position. The fourth fastener is a bolt.

[0018] Optionally, an upper interface portion recessed inward is provided on the upper inner panel of the A-pillar, and the upper hinge reinforcement plate is located in the upper interface portion.

[0019] The upper hinge reinforcement plate includes an upper hinge reinforcement plate main body portion and a first connecting flange connected to the inner side of the bottom surface of the upper hinge reinforcement plate main body portion. The first connecting flange is in contact with the bottom wall of the groove of the upper interface portion and is bolt-connected to the upper inner panel of the A-pillar at the first position. The upper hinge reinforcement plate main body portion is welded between the outer panel of the A-pillar and the upper inner panel of the A-pillar.

[0020] Optionally, a lower interface portion recessed inward is provided on the lower inner panel of the A-pillar. The lower hinge reinforcement plate is located in the lower interface portion. The upper interface portion and the lower interface portion are double-layered and welded.

[0021] The lower hinge reinforcement plate includes a lower hinge reinforcement plate main body portion and a second connecting flange connected to the upper side of the lower hinge reinforcement plate main body portion. The second connecting flange is in contact with the bottom wall of the groove of the lower interface portion. The lower hinge reinforcement plate main body portion is welded to the inner surface of the outer panel of the A-pillar.

[0022] The second connecting flange is bolted to the lower inner panel of the A-pillar at a second position; a front bulkhead lower cross member is provided on the inner side of the lower inner panel of the A-pillar, and the upper front end of the main body portion of the lower hinge reinforcement plate, the lower inner panel of the A-pillar, and the front bulkhead lower cross member are stacked in three layers and bolted at a third position; a torque box is provided on the inner side of the lower inner panel of the A-pillar, and the lower front end of the main body portion of the lower hinge reinforcement plate, the lower inner panel of the A-pillar, and the torque box are stacked in three layers and bolted at a fourth position.

[0023] For the A-pillar according to an embodiment of the present invention, an induction groove is provided on the upper inner panel of the A-pillar, and the included angle between the length direction of the induction groove and the vertical direction of the vehicle (Z direction in the vehicle coordinate system) is 0-15 degrees, that is, the included angle between the length direction of the induction groove and the vertical direction of the vehicle is relatively small. In this way, when the collision force of the vehicle is transmitted from front to back to the upper part of the A-pillar, the induction groove can guide the upper inner panel of the A-pillar to deform along the front-rear direction of the vehicle (X direction in the vehicle coordinate system). Since the induction groove is located in the front or middle part of the upper inner panel of the A-pillar in the front-rear direction of the vehicle, when the vehicle undergoes a frontal collision (such as a small overlap collision), if the induction groove is used as the front-rear boundary, the front part of the upper inner panel of the A-pillar is fully deformed to absorb energy, so as to solve the problem that the impact on the occupant compartment is relatively large due to insufficient energy absorption in the front part of the A-pillar during a small overlap collision. The upper hinge reinforcement plate is fixedly connected between the upper inner panel and the outer panel of the A-pillar, and the lower hinge reinforcement plate is fixedly connected between the lower inner panel and the outer panel of the A-pillar, strengthening the strength of the rear part of the A-pillar, and enabling the front part of the A-pillar to be fully deformed to absorb energy and the rear part of the A-pillar to remain unchanged or undergo small deformation during a small overlap collision, so as to reduce the impact on the occupant compartment and better improve the small overlap collision performance of the vehicle.

[0024] On the other hand, an embodiment of the present invention further provides a front body structure including the above-mentioned A-pillar.

[0025] Optionally, it further includes a sill beam, and the sill beam includes a sill outer reinforcement plate, a sill inner reinforcement plate, and a sill inner panel. The sill inner reinforcement plate is welded in the sill inner panel, and the front ends of the sill outer reinforcement plate, the sill inner reinforcement plate, and the sill inner panel are welded to the lower end of the lower inner panel of the A-pillar, and the sill outer reinforcement plate is welded between the lower inner panel of the A-pillar and the outer panel of the A-pillar.

[0026] Optionally, it further includes a front floor and a front floor cross member. The front end of the sill beam is welded to the lower end of the lower inner panel of the A-pillar. The front floor cross member extends along the vehicle width direction and is fixed on the front floor. The front floor is welded to the lower inner panel of the A-pillar. One end of the front floor cross member is welded to the sill inner panel, and the sill inner reinforcement plate is welded to the front floor.

[0027] Optionally, it further includes a lower cross member of the front bulkhead, an upper panel of the front bulkhead, and a lower panel of the front bulkhead. One end of the upper panel of the front bulkhead, one end of the lower panel of the front bulkhead, and one end of the lower cross member of the front bulkhead are welded to the inner side of the lower inner panel of the A-pillar. The lower side of the upper panel of the front bulkhead is welded to the lower cross member of the front bulkhead. The upper side of the lower panel of the front bulkhead is welded to the lower cross member of the front bulkhead. The lower side of the lower panel of the front bulkhead is welded to the front floor.

[0028] Optionally, it further includes a torque box and a front longitudinal beam. The inner side of the torque box is welded to the front longitudinal beam. The outer side of the torque box, the lower front end of the lower hinge reinforcement plate, and the lower inner panel of the A-pillar are stacked in three layers at the fourth position and bolted together. The outer side of the torque box is welded to the lower inner panel of the A-pillar and the lower panel of the front bulkhead.

[0029] Optionally, it further includes an upper longitudinal beam and a tower base. The tower base is welded to the upper inner panel of the A-pillar. The bottom of the upper longitudinal beam is welded to the tower base. The rear end of the upper longitudinal beam is welded to the outer panel of the A-pillar and the upper inner panel of the A-pillar.

[0030] Optionally, the upper longitudinal beam includes a front upper longitudinal beam and a rear upper longitudinal beam welded to the rear end of the front upper longitudinal beam. The front upper longitudinal beam and the rear upper longitudinal beam are respectively welded to the tower base. The rear end of the rear upper longitudinal beam is welded to the outer panel of the A-pillar and the upper inner panel of the A-pillar.

[0031] On the other hand, an embodiment of the present invention further provides a vehicle, including the above-mentioned A-pillar or the above-mentioned front body structure. Description of the Drawings

[0032] Figure 1 is a schematic diagram of a front body structure provided by an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of the front body structure provided by an embodiment of the present invention after removing the outer panel of the A-pillar;

[0034] Figure 3 is Figure 1 another perspective view of;

[0035] Figure 4 is a partial enlarged view of the A-pillar at the second position, the third position, and the fourth position provided by an embodiment of the present invention;

[0036] Figure 5 is a simulation comparison diagram of the shear force at the upper hinge measurement point area (the first hinge reinforcement plate area) between the front body structure provided by an embodiment of the present invention and a conventional front body structure;

[0037] Figure 6 is a simulation comparison diagram of the axial tension at the upper hinge measurement point area (the first hinge reinforcement plate area) between the front body structure provided by an embodiment of the present invention and a conventional front body structure;

[0038] Figure 7 It is a simulation comparison diagram of the shear force at the lower hinge measuring point area (the second hinge reinforcement plate area) between the front body structure provided by an embodiment of the present invention and the conventional front body structure;

[0039] Figure 8 It is a simulation comparison diagram of the axial tension at the upper hinge measuring point area (the second hinge reinforcement plate area) between the front body structure provided by an embodiment of the present invention and the conventional front body structure;

[0040] Figure 9 It is a simulation comparison diagram of the shear force at the bottom area of the A-pillar (the outer sill reinforcement plate area) between the front body structure provided by an embodiment of the present invention and the conventional front body structure;

[0041] Figure 10 It is a simulation comparison diagram of the axial tension at the bottom area of the A-pillar (the outer sill reinforcement plate area) between the front body structure provided by an embodiment of the present invention and the conventional front body structure;

[0042] Figure 11 It is a deformation comparison diagram of the front body structure provided by an embodiment of the present invention and the conventional front body structure (without an induced groove) in the area of the inner A-pillar panel.

[0043] The reference numerals in the specification are as follows:

[0044] 1. Outer A-pillar panel; 2. Front upper longitudinal beam; 3. Rear upper longitudinal beam; 4. Tower; 5. Lower cross beam of the front bulkhead; 6. Front longitudinal beam; 7. Torque box; 8. Upper hinge reinforcement plate; 81. Main body part of the upper hinge reinforcement plate; 82. First connecting flange; 9. Lower hinge reinforcement plate; 91. Main body part of the lower hinge reinforcement plate; 92. Second connecting flange; 10. Outer sill reinforcement plate; 11. Inner sill reinforcement plate; 12. Upper inner A-pillar panel; 121. Induced groove; 122. Upper interface part; 13. Front upper panel; 14. Lower inner A-pillar panel; 141. Lower interface part; 15. Front lower panel; 16. Front floor; 17. Inner sill panel; 18. Front floor cross beam; A1. First position; A2. Second position; A3. Third position; A4. Fourth position. Detailed implementation manners

[0045] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] See Figures 1 to 4, the front body structure provided by the first embodiment of the present invention includes an A-pillar. The A-pillar includes an outer A-pillar panel 1, an inner A-pillar panel, an upper hinge reinforcement plate 8, and a lower hinge reinforcement plate 9. The outer A-pillar panel 1 is connected to the outside of the inner A-pillar panel to form a cavity therebetween. The inner A-pillar panel includes an upper inner A-pillar panel 12 and a lower inner A-pillar panel 14 connected to the lower end of the upper inner A-pillar panel 12. The upper hinge reinforcement plate 8 and the lower hinge reinforcement plate 9 are located in the cavity. The upper hinge reinforcement plate 8 is fixedly connected between the upper inner A-pillar panel 12 and the outer A-pillar panel 1, and the lower hinge reinforcement plate 9 is fixedly connected between the lower inner A-pillar panel 14 and the outer A-pillar panel 1. An induction groove 121 is provided on the upper inner A-pillar panel 12. The induction groove 121 is located at the front or middle of the upper inner A-pillar panel 12 in the vehicle front-rear direction. The included angle between the length direction of the induction groove 121 and the vehicle vertical direction is 0-15 degrees. When the collision force of the vehicle is transmitted from front to back to the upper inner A-pillar panel 12, the induction groove 121 can guide the upper inner A-pillar panel 12 to deform along the vehicle front-rear direction.

[0047] Generally, during a small overlap collision, the upper collision force is transmitted to the passenger compartment through the force transmission path of "barrier - upper longitudinal beam and tower - upper part of the A-pillar", and the lower collision force is transmitted to the passenger compartment through the force transmission path of "barrier - wheel - lower part of the A-pillar".

[0048] For the A-pillar according to the embodiment of the present invention, an induction groove 121 is provided on the upper inner A-pillar panel 12. The included angle between the length direction of the induction groove 121 and the vehicle vertical direction (Z direction in the vehicle coordinate system) is 0-15 degrees, that is, the included angle between the length direction of the induction groove 121 and the vehicle vertical direction is relatively small. In this way, when the collision force of the vehicle is transmitted from front to back to the upper part of the A-pillar, the induction groove 121 can guide the upper inner A-pillar panel 12 to deform along the vehicle front-rear direction (X direction in the vehicle coordinate system). Since the induction groove 121 is located at the front or middle of the upper inner A-pillar panel 12 in the vehicle front-rear direction, when the vehicle undergoes a forward collision (such as a small overlap collision), if the induction groove 121 is used as the front-rear boundary, the front part of the upper inner A-pillar panel 12 can be fully deformed and absorb energy to solve the problem that the impact on the passenger compartment is relatively large due to insufficient energy absorption at the front part of the A-pillar during a small overlap collision. The upper hinge reinforcement plate 8 is fixedly connected between the upper inner A-pillar panel 12 and the outer A-pillar panel 1, and the lower hinge reinforcement plate 9 is fixedly connected between the lower inner A-pillar panel 14 and the outer A-pillar panel 1, strengthening the strength of the rear part of the A-pillar. It can achieve that the front part of the A-pillar is fully deformed and absorbs energy, and the rear part of the A-pillar remains unchanged or undergoes small deformation during a small overlap collision, so as to reduce the impact on the passenger compartment and better improve the small overlap collision performance of the vehicle.

[0049] See Figure 11 , the A-pillar of the embodiment of the present invention ( Figure 11the right part in), when the collision force of the vehicle is conducted from the front to the rear to the upper part of the A-pillar, the induction groove 121 can guide the inner upper panel 12 of the A-pillar to deform in the front-rear direction of the vehicle, the welding spot force of the A-pillar door opening is significantly reduced, and the risk of tearing of the welding spots at the upper part of the A-pillar will be significantly reduced. In the conventional front body structure ( Figure 11 the left part in), the induction groove 121 is not provided on the inner upper panel 12a of the A-pillar. Therefore, when a forward collision (such as a small offset collision) occurs to the vehicle, the front part of the inner upper panel 12a of the A-pillar cannot be fully deformed to absorb energy, and the risk of tearing of the welding spots at the upper part of the A-pillar is relatively high.

[0050] In one embodiment, the induction groove 121 is formed by recessing from the inner surface of the inner upper panel 12 of the A-pillar towards the outer panel 1 of the A-pillar. That is, the induction groove 121 is recessed outwards.

[0051] However, the present invention is not limited thereto, and the induction groove 121 being recessed inwards should also be within the protection scope of this application.

[0052] In one embodiment, the width of the induction groove 121 is greater than or equal to 12 mm to better guide the deformation of the inner upper panel 12 of the A-pillar; the length of the induction groove 121 can be as long as possible under the process conditions of the inner upper panel 12 of the A-pillar.

[0053] In one embodiment, referring to Figure 2 , the upper hinge reinforcing plate 8 and the inner upper panel 12 of the A-pillar are double-layered and overlapped at the first position A1 and are connected by bolts forming a first fastener. The upper hinge reinforcing plate 8 and the area of the inner upper panel 12 of the A-pillar corresponding to the first position A1 are provided with mounting holes for the bolts at the first position A1 to pass through. The first position A1 is close to the upper end of the inner lower panel 14 of the A-pillar. Preferably, two bolts are provided at the first position A1. In this way, the structural stability of the non-deformable area (rear part) at the upper part of the A-pillar can be ensured, and the risk of tearing of the welding spots in the upper hinge measuring point area can be reduced. Referring to Figure 5 and Figure 6 , through simulation analysis, it is found that for the A-pillar of this application, compared with the conventional A-pillar, the welding spot force in the upper hinge measuring point area has decreased by 20.8%.

[0054] In one embodiment, referring to Figure 1 , Figure 2 and Figure 4, the lower hinge reinforcement plate 9 and the lower inner A-pillar panel 14 are superposed in a double layer at the second position A2 and are connected by bolts forming the second fastener. The second position A2 is close to the lower end of the upper inner A-pillar panel 12. A lower cross member 5 of the front bulkhead is provided inside the lower inner A-pillar panel 14. The upper front end of the lower hinge reinforcement plate 9, the lower inner A-pillar panel 14 and the lower cross member 5 of the front bulkhead are superposed in a triple layer at the third position A3 and are connected by bolts forming the third fastener. Preferably, two bolts are provided at the second position A2, and two bolts are provided at the third position A3. The areas of the lower hinge reinforcement plate 9 and the lower inner A-pillar panel 14 corresponding to the second position A2 are provided with mounting holes for the bolts at the second position A2 to pass through. The areas of the upper front end of the lower hinge reinforcement plate 9, the lower inner A-pillar panel 14 and the lower cross member 5 of the front bulkhead corresponding to the third position A3 are provided with mounting holes for the bolts at the third position A3 to pass through.

[0055] A torque box 7 is provided inside the lower inner A-pillar panel 14. The lower front end of the lower hinge reinforcement plate 9, the lower inner A-pillar panel 14 and the torque box 7 are superposed in a triple layer at the fourth position A4 and are connected by bolts forming the fourth fastener. Preferably, one bolt is provided at the fourth position A4 to reduce the number of bolts while ensuring the connection strength at the fourth position A4. The areas of the lower front end of the lower hinge reinforcement plate 9, the lower inner A-pillar panel 14 and the torque box 7 corresponding to the fourth position A4 are provided with mounting holes for the bolts at the fourth position A4 to pass through.

[0056] In this way, in the middle and lower parts of the A-pillar, by designing bolt connections at the three positions of the second position A2, the third position A3 and the fourth position A4, the welding spot force in the measuring point area of the lower hinge is reduced, the risk of welding spot tearing in this area is reduced, and the instability of the middle and lower part structures of the A-pillar is avoided. Refer to Figure 7 and Figure 8 , through simulation analysis, it is found that for the A-pillar of the present application, compared with the conventional A-pillar, the welding spot force in the measuring point area of the lower hinge has decreased by 19.6%.

[0057] In addition, as an alternative, at least one of the first fastener, the second fastener, the third fastener and the fourth fastener may also be a rivet or other types of fasteners.

[0058] In an embodiment, refer to Figure 2 and Figure 3, the front body structure further includes a sill beam. The sill beam includes an outer sill reinforcement plate 10, an inner sill reinforcement plate 11, and an inner sill panel 17. The inner sill reinforcement plate 11 is welded into the inner sill panel 17. The front ends of the outer sill reinforcement plate 10, the inner sill reinforcement plate 11, and the inner sill panel 17 are welded to the lower end of the lower inner A-pillar panel 14. The outer sill reinforcement plate 10 is welded between the lower inner A-pillar panel 14 and the outer A-pillar panel 1. The bottom end portion of the lower inner A-pillar panel 14 extends in the vehicle's longitudinal direction and covers the inner side of the outer sill reinforcement plate 10. Adding the outer sill reinforcement plate 10 between the outer A-pillar panel 1 and the lower inner A-pillar panel 14 increases the failure limit of the solder joint force when the wheel impacts the solder joint (the solder joint between the inner A-pillar panel and the outer A-pillar panel) at the A-pillar position, thereby reducing the risk of solder joint tearing at the bottom position of the A-pillar. See Figure 9 and Figure 10 , through simulation analysis, it is found that for the A-pillar of the present application, compared with the conventional A-pillar, the failure limit of the solder joint force increases by more than 14.6% when the wheel impacts the solder joint (the solder joint between the inner A-pillar panel and the outer A-pillar panel) at the A-pillar position.

[0059] In this way, through the targeted design of the upper, middle-lower, and bottom regions of the A-pillar, the A-pillar can fully deform and absorb energy in the deformation energy absorption zone (the area of the A-pillar in front of the induction groove 121) and maintain structural stability in the non-deformation / small deformation zone (the area of the A-pillar behind the induction groove 121), thereby improving the small overlap collision performance.

[0060] Therefore, the A-pillar and the front body front structure of the present application effectively solve the technical pain points that it is difficult to balance the three aspects of "fully deforming and absorbing energy at the front part", "remaining undeformed / smallly deformed at the rear part", and "not having large-area solder joint tearing" in the A-pillar structure design, reduce the solder joint force at the key area of the A-pillar, improve the local solder joint strength limit, effectively reduce the risks of A-pillar solder joint tearing and structural instability, and significantly improve the small overlap collision performance of the whole vehicle. In addition, compared with the conventional A-pillar anti-tearing structure, the present application does not require adding an anti-tearing reinforcement plate through the targeted structural connection design, reduces the weight of the A-pillar structure, and improves the body lightweight level.

[0061] In one embodiment, see Figure 3 , the front body structure further includes a front floor 16 and a front floor cross member 18. The front end of the sill beam is welded to the lower end of the lower inner A-pillar panel 14. The front floor cross member 18 extends in the vehicle width direction and is fixed to the front floor 16. The front floor 16 is welded to the lower inner A-pillar panel 14. One end of the front floor cross member 18 is welded to the inner sill panel 17, and the inner sill reinforcement plate 11 is welded to the front floor 16.

[0062] In one embodiment, see Figure 1 and Figure 3, the front body structure further includes a lower cross member 5 of the front bulkhead, an upper panel 13 of the front bulkhead, and a lower panel 15 of the front bulkhead. One end of the upper panel 13 of the front bulkhead, one end of the lower panel 15 of the front bulkhead, and one end of the lower cross member 5 of the front bulkhead are welded to the inner side of the lower inner panel 14 of the A-pillar. The lower side of the upper panel 13 of the front bulkhead is welded to the lower cross member 5 of the front bulkhead. The upper side of the lower panel 15 of the front bulkhead is welded to the lower cross member 5 of the front bulkhead. The lower side of the lower panel 15 of the front bulkhead is welded to the front floor 16.

[0063] In one embodiment, referring to Figure 1 and Figure 2 , the front body structure further includes a torque box 7 and a front longitudinal beam 6. The inner side of the torque box 7 is welded to the front longitudinal beam 6. The outer side of the torque box 7, the lower front end of the lower hinge reinforcement plate 9, and the lower inner panel 14 of the A-pillar are stacked in three layers at the fourth position A4 and bolted together. The outer side of the torque box 7 is welded to the lower inner panel 14 of the A-pillar and the lower panel 15 of the front bulkhead.

[0064] In one embodiment, referring to Figure 1 and Figure 2 , the front body structure further includes an upper longitudinal beam and a tower base 4. The tower base 4 is welded to the upper inner panel 12 of the A-pillar. The bottom of the upper longitudinal beam is welded to the tower base 4. The rear end of the upper longitudinal beam is welded to the outer panel 1 of the A-pillar and the upper inner panel 12 of the A-pillar.

[0065] In one embodiment, the upper longitudinal beam includes a front upper longitudinal beam 2 and a rear upper longitudinal beam 3 welded to the rear end of the front upper longitudinal beam 2. The front upper longitudinal beam 2 and the rear upper longitudinal beam 3 are respectively welded to the tower base 4. The rear end of the rear upper longitudinal beam 3 is welded to the outer panel 1 of the A-pillar and the upper inner panel 12 of the A-pillar.

[0066] Of course, the upper longitudinal beam can also be integrally formed.

[0067] In one embodiment, referring to Figure 2 , an inwardly recessed upper interface portion 122 is provided on the upper inner panel 12 of the A-pillar. The upper hinge reinforcement plate 8 is located in the upper interface portion 122. The upper hinge reinforcement plate 8 includes an upper hinge reinforcement plate main body portion 81 and a first connecting flange 82 connected to the inner side of the bottom surface of the upper hinge reinforcement plate main body portion 81. The first connecting flange 82 is in contact with the bottom wall of the groove of the upper interface portion 122 and is bolted to the upper inner panel 12 of the A-pillar at the first position A1. The upper hinge reinforcement plate main body portion 81 is welded between the outer panel 1 of the A-pillar and the upper inner panel 12 of the A-pillar.

[0068] In one embodiment, referring to Figure 2, a lower interface portion 141 recessed inward is provided on the lower inner panel 14 of the A-pillar. The lower hinge reinforcement plate 9 is located in the lower interface portion 141. The upper interface portion 122 and the lower interface portion 141 are superposed in double layers and welded. The lower hinge reinforcement plate 9 includes a lower hinge reinforcement plate main body portion 91 and a second connecting flange 92 connected to the upper side of the lower hinge reinforcement plate main body portion 91. The second connecting flange 92 is in contact with the bottom wall of the groove of the lower interface portion 141. The lower hinge reinforcement plate main body portion 91 is welded to the inner surface of the outer panel 1 of the A-pillar; the second connecting flange 92 is bolt-connected to the lower inner panel 14 of the A-pillar at a second position A2; a lower cross beam 5 of the front bulkhead is provided inside the lower inner panel 14 of the A-pillar. The upper front end of the lower hinge reinforcement plate main body portion 91, the lower inner panel 14 of the A-pillar and the lower cross beam 5 of the front bulkhead are superposed in triple layers and bolt-connected at a third position A3; a moment box 7 is provided inside the lower inner panel 14 of the A-pillar. The lower front end of the lower hinge reinforcement plate main body portion 91, the lower inner panel 14 of the A-pillar and the moment box 7 are superposed in triple layers and bolt-connected at a fourth position A4.

[0069] In addition, an embodiment of the present invention further provides a vehicle, which includes the A-pillar or the front body structure of the above embodiment.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An A-pillar, characterized in that, It includes an outer A-pillar panel, an inner A-pillar panel, an upper hinge reinforcement plate and a lower hinge reinforcement plate. The outer A-pillar panel is connected to the outside of the inner A-pillar panel to form a cavity therebetween. The inner A-pillar panel includes an upper inner A-pillar panel and a lower inner A-pillar panel connected to the lower end of the upper inner A-pillar panel. The upper hinge reinforcement plate and the lower hinge reinforcement plate are located in the cavity. The upper hinge reinforcement plate is fixedly connected between the upper inner A-pillar panel and the outer A-pillar panel, and the lower hinge reinforcement plate is fixedly connected between the lower inner A-pillar panel and the outer A-pillar panel. An induction groove is provided on the upper inner A-pillar panel. The induction groove is located at the front or middle of the upper inner A-pillar panel in the vehicle's front-rear direction. The included angle between the length direction of the induction groove and the vehicle's vertical direction is 0-15 degrees. When the collision force of the vehicle is transmitted from front to back to the upper inner A-pillar panel, the induction groove can guide the upper inner A-pillar panel to deform along the vehicle's front-rear direction.

2. The A-pillar according to claim 1, characterized in that, The induction groove is formed by recessing from the inner surface of the upper inner A-pillar panel towards the outer A-pillar panel.

3. The A-pillar according to claim 1, characterized in that, The width of the induction groove is greater than or equal to 12 mm.

4. The A-pillar according to claim 1, characterized in that, The upper hinge reinforcement plate and the upper inner A-pillar panel are connected at a first position by a first fastener. The lower hinge reinforcement plate and the lower inner A-pillar panel are connected at a second position by a second fastener. A lower cross beam of the front wall panel is provided on the inner side of the lower inner A-pillar panel. The upper front end of the lower hinge reinforcement plate, the lower inner A-pillar panel and the lower cross beam of the front wall panel are connected at a third position by a third fastener. A moment box is provided on the inner side of the lower inner A-pillar panel. The lower front end of the lower hinge reinforcement plate, the lower inner A-pillar panel and the moment box are connected at a fourth position by a fourth fastener.

5. The A-pillar according to claim 4, characterized in that, The upper hinge reinforcement plate and the upper inner A-pillar panel are double-layered and stacked at the first position. The first fastener is a bolt, and the first position is close to the upper end of the lower inner A-pillar panel.

6. The A-pillar according to claim 4, characterized in that, The lower hinge reinforcement plate and the lower inner A-pillar panel are double-layered and stacked at the second position. The second fastener is a bolt, and the second position is close to the lower end of the upper inner A-pillar panel.

7. The A-pillar according to claim 4, characterized in that, The upper front end of the lower hinge reinforcement plate, the lower inner A-pillar panel and the lower cross beam of the front wall panel are triple-layered and stacked at the third position. The third fastener is a bolt.

8. The A-pillar according to claim 4, characterized in that, The lower front end of the lower hinge reinforcement plate, the lower inner A-pillar panel and the moment box are triple-layered and stacked at the fourth position. The fourth fastener is a bolt.

9. The A-pillar according to claim 1, wherein, An upper interface portion recessed inward is provided on the upper inner A-pillar panel, and the upper hinge reinforcement plate is located in the upper interface portion. The upper hinge reinforcement plate includes an upper hinge reinforcement plate main body portion and a first connecting flange connected to the inner side of the bottom surface of the upper hinge reinforcement plate main body portion. The first connecting flange is attached to the bottom wall of the groove of the upper interface portion and is bolt-connected to the upper inner A-pillar panel at the first position. The upper hinge reinforcement plate main body portion is welded between the outer A-pillar panel and the upper inner A-pillar panel.

10. The A-pillar according to claim 9, characterized in that, The lower inner A-pillar panel is provided with a lower interface portion recessed inward. The lower hinge reinforcement plate is located in the lower interface portion. The upper interface portion and the lower interface portion are double-layered and stacked and welded. The lower hinge reinforcement plate includes a lower hinge reinforcement plate main body and a second connecting flange connected to the upper side of the lower hinge reinforcement plate main body. The second connecting flange is attached to the groove bottom wall of the lower interface portion, and the lower hinge reinforcement plate main body is welded to the inner surface of the A-pillar outer panel; The second connecting flange is bolted to the lower inner panel of the A-pillar at a second position; a lower cross member of the front bulkhead is provided inside the lower inner panel of the A-pillar. The upper front end of the lower hinge reinforcement plate main body, the lower inner panel of the A-pillar, and the lower cross member of the front bulkhead are stacked in three layers and bolted at a third position; a torque box is provided inside the lower inner panel of the A-pillar. The lower front end of the lower hinge reinforcement plate main body, the lower inner panel of the A-pillar, and the torque box are stacked in three layers and bolted at a fourth position.

11. A front body structure, characterized in that, An A-pillar according to any one of claims 1 to 10.

12. The front body structure according to claim 11, characterized in that, It further includes a sill beam, which includes a sill outer reinforcement plate, a sill inner reinforcement plate, and a sill inner panel. The sill inner reinforcement plate is welded to the sill inner panel. The front ends of the sill outer reinforcement plate, the sill inner reinforcement plate, and the sill inner panel are welded to the lower end of the lower inner panel of the A-pillar, and the sill outer reinforcement plate is welded between the lower inner panel of the A-pillar and the A-pillar outer panel.

13. A vehicle, characterized in that, An A-pillar according to any one of claims 1-10 or a front body structure according to claim 11 or 12.

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