A structure and a body-in-white for improving the torsional stiffness of a convex rear panel

Abstract

This application relates to the technical field of the rear body beam, and particularly relates to a structure and a white body for enhancing the torsional stiffness of a convex rear body. The structure for enhancing the torsional stiffness of the convex rear body includes an outer rear body panel, a lower rear body cross beam, a rear body longitudinal beam, and a reinforcing member. Among them, the lower rear body cross beam is disposed in a fitting manner on the outer rear body panel; the rear body longitudinal beam is connected to the outer rear body panel and is connected to the lower rear body cross beam along a direction perpendicular to the length direction of the lower rear body cross beam, and there is a beam cavity between the rear body longitudinal beam and the outer rear body panel; the reinforcing member is disposed at the bending point of the rear body longitudinal beam and is located in the beam cavity. By providing a structure and a white body for enhancing the torsional stiffness of a convex rear body, the embodiments of this application solve the problem of insufficient torsional stiffness of the convex rear body in the related art.

Description

Technical Field

[0001] This application relates to the technical field of vehicle rear body beams, and particularly to a structure and a white body for improving the torsional stiffness of a convex rear body. Background Art

[0002] Currently, many commercial vehicle cabs adopt the structure of a convex rear body. This structure can expand the internal space of the cab, improve the comfort of the cab, and is more competitive in the market.

[0003] However, compared with a flat rear body, the torsional stiffness of the white body decreases significantly for the convex rear body structure. The torsional stiffness of the white body is very important. Insufficient torsional stiffness will affect the durability and comfort of the vehicle. Currently, there is no solution to improve the torsional stiffness of the white body with a convex rear body structure. Summary of the Invention

[0004] Embodiments of this application provide a structure and a white body for improving the torsional stiffness of a convex rear body to solve the problem of insufficient torsional stiffness of the convex rear body in the related art.

[0005] To achieve the above object, in a first aspect, embodiments of this application provide a structure for improving the torsional stiffness of a convex rear body, which includes:

[0006] An outer rear body panel;

[0007] A lower rear body cross beam, which is attached to the outer rear body panel;

[0008] A rear body longitudinal beam, which is connected to the outer rear body panel and is connected to the lower rear body cross beam along the length direction perpendicular to the lower rear body cross beam, and there is a longitudinal beam cavity between the rear body longitudinal beam and the outer rear body panel;

[0009] A reinforcing member, which is arranged at the bending point of the rear body longitudinal beam and is located in the longitudinal beam cavity.

[0010] In some embodiments, the reinforcing member includes a first reinforcing member, which is arranged in the longitudinal beam cavity and is attached to the side of the rear body longitudinal beam facing the outer rear body panel. Both ends of the first reinforcing member extend to between the rear body longitudinal beam and the outer rear body panel, or both ends of the first reinforcing member respectively extend and are attached to the side walls of the rear body longitudinal beam.

[0011] In some embodiments, the reinforcing member includes a second reinforcing member, which includes a main body and a flanging. The main body is arranged in the longitudinal beam cavity. The flanging is connected to the main body and extends and is fixed to between the rear body longitudinal beam and the outer rear body panel. The longitudinal beam cavity includes a first inner cavity between the rear body longitudinal beam and the second reinforcing member and a second inner cavity between the outer rear body panel and the second reinforcing member.

[0012] In some embodiments, the reinforcing member includes a first reinforcing member and a second reinforcing member. The second reinforcing member includes a main body and a flange. The main body is disposed in the longitudinal beam cavity. The flange is connected to the main body and extends and is fixed between the rear longitudinal beam and the rear outer panel. The second reinforcing member divides the longitudinal beam cavity into a first inner cavity and a second inner cavity;

[0013] The first reinforcing member is disposed in the first inner cavity and is attached to the side of the rear longitudinal beam facing the rear outer panel. The two ends of the first reinforcing member respectively extend and are attached to the side walls of the rear longitudinal beam.

[0014] In some embodiments, the reinforcing member includes a third reinforcing member. The third reinforcing member includes a third cavity. The third reinforcing member is disposed in the longitudinal beam cavity. The outer wall surface of the third reinforcing member is attached to the rear longitudinal beam and the rear outer panel.

[0015] In some embodiments, the lower rear cross beam is connected to the end of the rear longitudinal beam away from the rear outer panel, and the lower rear cross beam covers the bending point.

[0016] In some embodiments, the distance that the lower rear cross beam exceeds the bending point is not less than 20 mm.

[0017] In some embodiments, the rear outer panel includes a bent section;

[0018] Along the length direction of the lower rear cross beam, the part of the lower rear cross beam attached to the bent section is provided with weight reduction holes.

[0019] In some embodiments, a reinforcing rib is provided at the lap joint of the lower rear cross beam and the rear longitudinal beam.

[0020] In a second aspect, a white body is provided, which includes:

[0021] A structure for improving the torsional stiffness of a convex rear enclosure as described in any one of the above;

[0022] The floor bulge is welded to the lower rear cross beam.

[0023] The beneficial effects brought by the technical solutions provided in this application include:

[0024] The embodiment of the present application provides a structure and a white body for enhancing the torsional stiffness of a convex rear panel. Since the rear suspension mounting interfaces of the flat rear panel and the convex rear panel are usually kept consistent to maintain the universality of the cab, the white body of the convex rear panel moves backward relative to the rear hinge point, resulting in a significant reduction in the torsional stiffness of the white body. Therefore, in this embodiment, a reinforcing member for strengthening the strength and torsional resistance at the bending position of the convex rear panel is provided in the beam cavity formed between the rear longitudinal beam and the outer rear panel to improve the torsional stiffness at this position. Since the reinforcing member is only provided at the position with a high torsional stiffness sensitivity, the overall weight of the rear panel increases slightly, and the effect of enhancing the torsional stiffness is good. Therefore, the problem of insufficient torsional stiffness of the convex rear panel in the related art can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 A cross-sectional view of the third embodiment of the rear longitudinal beam and the outer rear panel at the bending point provided by the embodiment of the present application;

[0027] Figure 2 A cross-sectional view of the fourth embodiment of the rear longitudinal beam and the outer rear panel at the bending point provided by the embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure for enhancing the torsional stiffness of the convex rear panel provided by the embodiment of the present application;

[0029] Figure 4 A front view of the structure for enhancing the torsional stiffness of the convex rear panel provided by the embodiment of the present application;

[0030] Figure 5 A schematic diagram of the lap joint of the rear longitudinal beam and the lower rear cross member provided by the embodiment of the present application;

[0031] Figure 6 For Figure 5 The cross-sectional view at A-A in

[0032] Figure 7 A schematic diagram of the connection between the structure for enhancing the torsional stiffness of the convex rear panel and the floor provided by the embodiment of the present application.

[0033] In the figure: 1. Outer panel of the rear enclosure; 11. Bent section; 12. Rear window; 2. Longitudinal beam of the rear enclosure; 21. Cavity of the longitudinal beam; 211. First inner cavity; 212. Second inner cavity; 3. First reinforcing member; 4. Second reinforcing member; 41. Main body; 42. Flange; 5. Third reinforcing member; 51. Third cavity; 6. Lower cross beam of the rear enclosure; 61. Weight reduction hole; 62. Protrusion of the cross beam; 63. Flange of the lower cross beam; 64. Cavity of the lower cross beam; 7. Floor bulge; 8. Bending point. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0035] The embodiment of the present application provides a structure for enhancing the torsional stiffness of a convex rear enclosure, which can solve the problem of insufficient torsional stiffness of the convex rear enclosure in the related art.

[0036] See Figure 1 Refer to Figure 6 As shown, the embodiment of the present application provides a structure for enhancing the torsional stiffness of a convex rear enclosure, including an outer panel 1 of the rear enclosure, a lower cross beam 6 of the rear enclosure, a longitudinal beam 2 of the rear enclosure and a reinforcing member. Among them, the lower cross beam 6 of the rear enclosure is disposed in a fitting manner on the outer panel 1 of the rear enclosure, and the longitudinal beam 2 of the rear enclosure is connected to the lower cross beam 6 along the length direction perpendicular to the lower cross beam 6 of the rear enclosure. Specifically, the longitudinal beam 2 of the rear enclosure is connected to the outer panel 1 of the rear enclosure, and in combination with Figure 1 and Figure 2 as shown, there is a cavity 21 of the longitudinal beam between the longitudinal beam 2 of the rear enclosure and the outer panel 1 of the rear enclosure.

[0037] Further, due to the bulge of the rear enclosure, that is, the outer panel 1 of the rear enclosure bulges, then in combination with Figure 3 , [[ID=2⑤]] Figure 5 and Figure 6 as shown, the longitudinal beam 2 of the rear enclosure that fits the outer panel 1 of the rear enclosure in the direction perpendicular to the Z direction of the vehicle coordinate system has a bending point 8 at the bulge, and the reinforcing member is disposed at the bending point 8 of the longitudinal beam 2 of the rear enclosure and is located in the cavity 21 of the longitudinal beam.

[0038] The embodiment of the present application provides a structure and a white body for enhancing the torsional stiffness of the convex rear panel. Since the cab rear mount is generally installed at the lower part of the rear panel or near the rear panel at the rear end of the floor, the convexity of the rear panel structure has a relatively large impact on the torsional stiffness of the white body. Therefore, in this embodiment, a reinforcing member is provided at the bending portion of the convex rear panel to strengthen the strength and anti-torque of the bending portion. The reinforcing member is arranged in the longitudinal beam cavity 21 formed between the rear panel longitudinal beam 2 and the outer rear panel 1 to improve the torsional stiffness here. Since the reinforcing member is only provided at the position with higher torsional stiffness sensitivity, the overall weight of the rear panel increases less, and the effect of enhancing the torsional stiffness is good. Therefore, the problem of insufficient torsional stiffness of the convex rear panel in the related art can be solved.

[0039] For the setting of the reinforcing member, the present application gives the following four embodiments:

[0040] Embodiment 1:

[0041] See Figure 3 As shown, the reinforcing member includes a first reinforcing member 3. The first reinforcing member 3 is arranged in the longitudinal beam cavity 21 and is attached to the side of the rear panel longitudinal beam 2 facing the outer rear panel 1. Both ends of the first reinforcing member 3 extend between the rear panel longitudinal beam 2 and the outer rear panel 1, or both ends of the first reinforcing member 3 respectively extend and are attached to the side walls of the rear panel longitudinal beam 2.

[0042] Specifically, as shown in combination with Figure 1 As shown, the first reinforcing member 3 is located between the rear panel longitudinal beam 2 and the outer rear panel 1. Along the length direction of the rear panel longitudinal beam 2, the length of the first reinforcing member 3 covers the two bending portions of the convex rear panel, that is, covers the two bending points 8 of the rear panel longitudinal beam 2;

[0043] Furthermore, along the length direction of the rear panel longitudinal beam 2, both ends of the first reinforcing member 3 exceed the bending point 8 by 10 - 30 mm to play a strengthening role.

[0044] Optionally, the first reinforcing member 3 can be made of a conventional steel plate stamping part or an aluminum alloy stamping part.

[0045] Optionally, both ends of the first reinforcing member 3 extend between the rear panel longitudinal beam 2 and the outer rear panel 1 to strengthen the rear panel longitudinal beam 2, and the first reinforcing member 3 can be welded between the rear panel longitudinal beam 2 and the outer rear panel 1.

[0046] Or, as shown in Figure 1 As shown, both ends of the first reinforcing member 3 respectively extend and are attached to the side walls of the rear panel longitudinal beam 2 without contacting the outer rear panel 1, playing a partial strengthening role, and the first reinforcing member 3 can be welded to the rear panel longitudinal beam 2.

[0047] Embodiment 2:

[0048] The reinforcing member includes a second reinforcing member 4, and the second reinforcing member 4 includes a main body 41 and a flanging 42. The main body 41 is disposed in the longitudinal beam cavity 21. The flanging 42 is connected to the main body 41 and extends and is fixed between the rear longitudinal beam 2 and the outer rear panel 1. The longitudinal beam cavity 21 includes a first inner cavity between the rear longitudinal beam 2 and the second reinforcing member 4, and a second inner cavity between the outer rear panel 1 and the second reinforcing member 4.

[0049] Specifically, as can be referred to Figure 1 shown, the flangings 42 are respectively arranged at both ends of the main body 41 and extend in a direction away from the main body 41. Combining Figure 3 shown, Figure 1 is a schematic cross-sectional view perpendicular to the length direction of the rear longitudinal beam 2 at the bending point 8, that is, the flanging 42 extends in a direction away from the rear longitudinal beam 2. Further, the length direction of the second reinforcing member 4 is set to exceed the bending point 8, that is, it covers two bending points 8 of the rear longitudinal beam 2; on the same rear longitudinal beam 2, the second reinforcing member 4 can be divided into two parts and respectively arranged at the two bending points 8, or can be arranged as one to cover the two bending points 8 at the same time.

[0050] Further, along the length direction of the rear longitudinal beam 2, both ends of the second reinforcing member 4 exceed the bending point 8 by 10 - 30 mm to play a reinforcing role.

[0051] Optionally, combining Figure 1 shown, the second reinforcing member 4 divides the longitudinal beam cavity 21 into two parts, namely a first inner cavity 211 and a second inner cavity 212, and by increasing the inner cavity and the reinforcing member, the effect of enhancing the stiffness of the bent part of the beam cavity is achieved.

[0052] Optionally, the second reinforcing member 4 can be made of a conventional steel plate stamping part or an aluminum alloy stamping part. Further, the connection between the second reinforcing member 4 and the rear longitudinal beam 2 and the outer rear panel 1 is enhanced by welding structural adhesive.

[0053] In some alternative embodiments, referring to Figure 1 shown, the outer rear panel 1 is provided with reinforcing ribs, and the reinforcing ribs protrude towards the rear longitudinal beam 2 to strengthen the outer rear panel. In the second reinforcing member 4 provided in this embodiment, the welding points of its flanging 42 with the rear longitudinal beam 2 and the outer rear panel 1 should be avoided from the reinforcing ribs so that the function of the reinforcing ribs can be exerted.

[0054] Embodiment Three:

[0055] Referring to Figure 1As shown in the figure, the reinforcing member includes a first reinforcing member 3 and a second reinforcing member 4. The second reinforcing member 4 includes a main body 41 and a flange 42. The main body 41 is disposed in the longitudinal beam cavity 21. The flange 42 is connected to the main body 41 and extends and is fixed between the rear longitudinal beam 2 and the rear outer panel 1. The second reinforcing member 4 divides the longitudinal beam cavity 21 into a first inner cavity 211 and a second inner cavity 212;

[0056] The first reinforcing member 3 is disposed in the first inner cavity 211 and is attached to the surface of the rear longitudinal beam 2 facing the rear outer panel 1. Both ends of the first reinforcing member 3 respectively extend and are attached to the side walls of the rear longitudinal beam 2.

[0057] Specifically, Embodiment III is a combination of Embodiment I and Embodiment II, that is, two types of reinforcing members are provided in the longitudinal beam cavity 21 formed by the rear longitudinal beam 2 and the rear outer panel 1, and the cross-section is as Figure 1 shown. Among them, the first reinforcing member 3 is attached to the rear longitudinal beam 2 to enhance the strength of the rear longitudinal beam 2, and the second reinforcing member 4 divides the longitudinal beam cavity 21 into two parts to achieve the effect of enhancing the stiffness of the longitudinal beam cavity 21 at the bending point 8.

[0058] Furthermore, in combination with Figure 1 shown, the flange 42 of the second reinforcing member 4 is disposed between the rear longitudinal beam 2 and the rear outer panel 1, and the edge of the first reinforcing member 3 is arranged to avoid the second reinforcing member 4, that is, the end of the first reinforcing member 3 does not completely fill the longitudinal beam cavity 21 between the rear longitudinal beam 2 and the rear outer panel 1, so as to avoid interference of the first reinforcing member 3 with the second reinforcing member 4.

[0059] It should be noted that in this embodiment, the first reinforcing member 3 is not also disposed between the rear longitudinal beam 2 and the rear outer panel 1 in order to avoid problems such as too many welding parts resulting in poor welding effect or excessive local thickness.

[0060] In some alternative embodiments, as shown in Figure 1 the figure, reinforcing ribs are provided on the rear outer panel 1, and the reinforcing ribs protrude towards the rear longitudinal beam 2 to strengthen the rear outer panel. In the second reinforcing member 4 provided in this embodiment, the welding points of its flange 42 with the rear longitudinal beam 2 and the rear outer panel 1 should avoid the reinforcing ribs so that the function of the reinforcing ribs can be exerted.

[0061] For the installation sequence of the first reinforcing member 3 and the second reinforcing member 4, this embodiment provides the following installation steps: Provide the rear longitudinal beam 2, weld the first reinforcing member 3 on the rear longitudinal beam 2, weld the second reinforcing member 4 to the rear longitudinal beam 2 together, and finally weld the rear longitudinal beam 2 and the rear outer panel 1 together.

[0062] The second reinforcing member 4 provided in this embodiment can be a steel plate stamping part, and its cross-section is as Figure 1As shown, it is in a zigzag shape. The second reinforcing member 4 is arranged between the rear longitudinal beam 2 and the outer rear panel 1, dividing the cross-section of the longitudinal beam cavity 21 into two parts. The first reinforcing member 3 provided in this embodiment can be a steel stamping part, and its cross-section is as Figure 1 shown, which is in a U-shaped cross-section. The first reinforcing member 3 is located at the bending part of the rear longitudinal beam 2 and is arranged closely against the rear longitudinal beam 2, and its length covers the two bending parts of the convex rear panel.

[0063] Optionally, the first reinforcing member 3, the second reinforcing member 4 are welded to the rear longitudinal beam 2 and the outer rear panel 1, and the overlapping edges are coated with glue to achieve a sealing effect.

[0064] Embodiment 4:

[0065] Refer to Figure 2 As shown, the reinforcing member includes a third reinforcing member 5. The third reinforcing member 5 includes a third cavity 51. The third reinforcing member 5 is arranged in the longitudinal beam cavity 21, and the outer wall surface of the third reinforcing member 5 is attached to the rear longitudinal beam 2 and the outer rear panel 1.

[0066] Specifically, the cross-section of the third reinforcing member 5 is as Figure 2 shown. It is arranged in the longitudinal beam cavity 21, and a third cavity 51 is formed inside. The outer wall surface of the third reinforcing member 5 is attached to the inner surface of the longitudinal beam cavity 21, providing support for the rear longitudinal beam 2 and also thickening the rear longitudinal beam 2 and the outer rear panel 1.

[0067] Furthermore, the third reinforcing member 5 can be selected to be made of aluminum alloy profiles, and the manufacturing method can be extrusion, etc. The cross-section of the third reinforcing member 5 is a closed beam cavity, and it can be in a square shape, a rectangular shape, etc. The connection method with the rear longitudinal beam and the outer rear panel can be bolt connection, hot melt self-tapping screw, welding, etc.

[0068] The third reinforcing member 5 provided in this embodiment can be an aluminum alloy extrusion profile, and its cross-section is as Figure 2 shown, which is a "square-shaped" closed cavity. The third reinforcing member 5 is arranged at the bending part of the rear longitudinal beam 2, is arranged closely against the rear longitudinal beam 2, and forms a closed cavity with the outer rear panel 1. Further, the third reinforcing member 5 is located between the rear longitudinal beam 2 and the outer rear panel 1, and the length of the third reinforcing member 5 covers the two bending points 8 of the convex rear panel.

[0069] Optionally, the connection method between the third reinforcing member 5 and the rear longitudinal beam 2 and the outer rear panel 1 is hot melt self-tapping screw, and glue is applied to the overlapping edges of the third reinforcing member 5 and the rear longitudinal beam 2 and the outer rear panel 1 to form a seal.

[0070] In some alternative embodiments, refer to Figures 3 to 6 shown. The lower rear cross beam 6 is connected to one end of the rear longitudinal beam 2 away from the outer rear panel 1, and the lower rear cross beam 6 covers the bending point 8.

[0071] Specifically, the rear under beam 6 is disposed on the side of the rear longitudinal beam 2 away from the rear outer panel 1 and covers the bending point 8 of the rear longitudinal beam 2 to play a strengthening role.

[0072] Optionally, the distance by which the rear under beam 6 exceeds the bending point 8 is not less than 20 mm.

[0073] The rear under beam 6 needs to be disposed in contact with the bottom surface of the rear longitudinal beam 2 (i.e., the end of the rear longitudinal beam 2 away from the rear outer panel 1) and cover the bending point 8 of the rear longitudinal beam 2. The distance by which the rear under beam 6 exceeds the bending point 8 refers to the distances by which the two ends of the rear under beam 6 respectively exceed the bending point 8 along the length direction of the rear longitudinal beam 2.

[0074] See Figure 3 、 Figure 4 and Figure 5 As shown, the rear under beam 6 is in a vertical "I" shape. The rear under beam 6 includes a beam protruding portion 62 as shown in Figure 5 The beam protruding portion 62 covers and overlaps the rear longitudinal beam 2 and is disposed beyond the bending point 8 to enhance the strength at the bending point 8.

[0075] Optionally, the length by which the beam protruding portion 62 exceeds the bending point 8 vertically is greater than 20 mm. Of course, generally speaking, the longer the exceeding length, the better the strengthening effect on the bending point 8. However, if the exceeding length is too long, it will increase the part weight. As shown in Figure 3 and Figure 4 The upward extension of the beam protruding portion 62 beyond the bending point 8 should not exceed the lower edge height of the rear window 12, and downward it is connected to the rear end of the floor bulge 7 and the rear outer panel.

[0076] See Figure 6 As shown in Figure 6 is a sectional view of the rear under beam 6 and the rear outer panel 1 at A - A. Among them, it can be seen that the rear under beam 6 includes a lower beam flange 63. The lower beam flange 63 is disposed on both sides of the rear under beam 6 along its width direction and both exceed the bending point 8. Preferably, as shown in Figure 6 The closest distance n between the lower beam flange 63 at the lower part of the rear under beam 6 and the rear outer panel 1 at the connection exceeds 20 mm. The longer the lower part of the rear under beam 6 exceeds the bending point 8, the better the effect of improving the torsional stiffness.

[0077] Furthermore, the lower beam flange 63 is in contact with the rear outer panel 1, so that a lower beam cavity 64 is formed between the rear under beam 6 and the rear outer panel 1. The lower beam cavity 64 is a closed or semi - closed beam cavity, and the height of the lower beam cavity 64 should not be lower than the height of the longitudinal beam cavity 21, that is, Figure 6 the distance from the rear under beam 6 to the rear outer panel 1 in Figure 1 or Figure 2The distance from the rear longitudinal beam 2 to the outer rear panel 1 is such that the lower rear cross beam 6 overlaps the rear longitudinal beam 2. Preferably, the higher the beam cavity height, the better the effect of improving the torsional stiffness. Here, the beam cavity includes the longitudinal beam cavity 21 and the lower cross beam cavity 64.

[0078] In some alternative embodiments, referring to Figure 3 and Figure 4 as shown, the outer rear panel 1 includes a bent section 11; along the length direction of the lower rear cross beam 6, a weight reduction hole 61 is provided at the part where the lower rear cross beam 6 fits the bent section 11.

[0079] Specifically, a closed or semi-closed cavity is formed between the middle of the lower rear cross beam 6 and the outer rear panel 1. Below the convex rear bending point 8, the lower rear cross beam 6 can be connected to the rear end of the floor bulge 7 and the outer rear panel. Optionally, the connection between the lower rear cross beam 6 and the rear longitudinal beam 2 and the outer rear panel 1 is enhanced by welding structural adhesive, and the lower rear cross beam 6 can be made of a conventional steel plate stamping part or an aluminum alloy part.

[0080] Furthermore, since the middle of the lower rear cross beam 6 is less affected by torsion, weight reduction holes 61 can be added to reduce the weight of the part.

[0081] Optionally, there are multiple weight reduction holes 61, which are arranged at intervals along the length direction of the lower rear cross beam 6.

[0082] Optionally, the lower rear cross beam 6 can be provided with reinforcing ribs to improve the local stiffness of the part.

[0083] In some alternative embodiments, while a reinforcing member is provided between the rear longitudinal beam 2 and the outer rear panel 1, the beam protrusion 62 of the lower rear cross beam 6 is also covered on the rear longitudinal beam 2 to achieve a multiple strengthening effect.

[0084] Preferably, for the setting of the reinforcing member, the above-mentioned Embodiment 3 is adopted, that is, the reinforcing member includes the first reinforcing member 3 and the second reinforcing member 4. Among them, the first reinforcing member 3 is attached to the rear longitudinal beam 2 to enhance the strength of the rear longitudinal beam 2, and the second reinforcing member 4 divides the longitudinal beam cavity 21 into two parts to enhance the stiffness of the longitudinal beam cavity 21 at the bending point 8.

[0085] Specifically, in this embodiment, after the rear structure changes from flat to convex, the torsional stiffness of the white body in white (BIW) decreases by 20% (from 45×10 5 N·m 2 / rad to 34×10 5 N·m 2 / rad), which does not meet the BIW stiffness characteristic target.

[0086] By setting a reinforcing member at the bending portion and combining it with the rear under beam 6, through CAE calculation and verification, before adopting this solution, the torsional stiffness of the convex rear body-in-white is 34×10 5 N·m 2 / rad. After adopting this solution, the torsional stiffness of the body-in-white is re-increased to 45×10 5 N·m 2 / rad, and the torsional stiffness is increased by 36%, meeting the requirements of the body-in-white stiffness characteristics.

[0087] Since the reinforcing member and the beam protruding portion 62 are only set at the bending portion of the convex rear, and the reinforcing member and the rear under beam 6 can use aluminum alloy materials, the weight increase of the rear assembly block is small. While improving the local stiffness, the overall weight is effectively reduced.

[0088] The embodiment of the present application also provides a body-in-white, which includes a structure for improving the torsional stiffness of the convex rear as described in any one of the above. Combining Figure 7 as shown, the convex rear is connected to the floor. Specifically, the lower edge of the rear under beam 6 extends towards the floor and is welded to Figure 6 the floor bulge 7 shown.

[0089] Furthermore, the rear under beam 6 includes a beam protruding portion 62, and the beam protruding portion 62 extends downward and is welded to the floor bulge 7.

[0090] The embodiment of the present application provides a structure and a body-in-white for improving the torsional stiffness of the convex rear. By setting a reinforcing member and the rear under beam 6 with a beam protruding portion 62 at the weak part (bending point 8) of the torsional stiffness of the convex rear, the problem of insufficient torsional stiffness of the convex rear in the related art is solved.

[0091] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0092] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0093] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A structure for enhancing the torsional stiffness of a convex rear panel, characterized in that It includes: Rear outer panel (1); Lower rear cross beam (6), which is fitted on the rear outer panel (1); Rear longitudinal beam (2), which is connected to the rear outer panel (1) and is connected to the lower rear cross beam (6) along the length direction perpendicular to the lower rear cross beam (6), and there is a longitudinal beam cavity (21) between the rear longitudinal beam (2) and the rear outer panel (1); Reinforcing member, which is arranged at the bending point (8) of the rear longitudinal beam (2) and is located in the longitudinal beam cavity (21); The lower rear cross beam (6) is connected to one end of the rear longitudinal beam (2) away from the rear outer panel (1), and the lower rear cross beam (6) covers the bending point (8); The lower rear cross beam (6) includes a cross beam protrusion (62), and the cross beam protrusion (62) covers and overlaps on the rear longitudinal beam (2); The lower rear cross beam (6) includes a lower cross beam flange (63), and the lower cross beam flange (63) is arranged on both sides of the lower rear cross beam (6) along the width direction of the lower rear cross beam (6); The lower cross beam flange (63) is in contact with the rear outer panel (1), so that a lower cross beam cavity (64) is formed between the lower rear cross beam (6) and the rear outer panel (1).

2. The structure for improving the torsional stiffness of the convex rear enclosure according to claim 1, wherein: The reinforcing member includes a first reinforcing member (3), the first reinforcing member (3) is arranged in the longitudinal beam cavity (21) and is fitted on the side of the rear longitudinal beam (2) facing the rear outer panel (1), and both ends of the first reinforcing member (3) extend between the rear longitudinal beam (2) and the rear outer panel (1), or both ends of the first reinforcing member (3) respectively extend and are attached to the side walls of the rear longitudinal beam (2).

3. The structure for improving the torsional stiffness of the convex rear enclosure according to claim 1, wherein: The reinforcing member includes a second reinforcing member (4), the second reinforcing member (4) includes a main body (41) and a flange (42), the main body (41) is arranged in the longitudinal beam cavity (21), the flange (42) is connected to the main body (41) and extends and is fixed between the rear longitudinal beam (2) and the rear outer panel (1), and the longitudinal beam cavity (21) includes a first inner cavity between the rear longitudinal beam (2) and the second reinforcing member (4) and a second inner cavity between the rear outer panel (1) and the second reinforcing member (4).

4. The structure for improving the torsional stiffness of the convex rear enclosure according to claim 1, wherein: The reinforcing member includes a first reinforcing member (3) and a second reinforcing member (4), the second reinforcing member (4) includes a main body (41) and a flange (42), the main body (41) is arranged in the longitudinal beam cavity (21), the flange (42) is connected to the main body (41) and extends and is fixed between the rear longitudinal beam (2) and the rear outer panel (1), and the second reinforcing member (4) divides the longitudinal beam cavity (21) into a first inner cavity (211) and a second inner cavity (212); The first reinforcing member (3) is disposed in the first inner cavity (211) and is attached to the side of the rear longitudinal beam (2) facing the rear outer panel (1). Both ends of the first reinforcing member (3) extend and are attached to the side walls of the rear longitudinal beam (2).

5. The structure for enhancing the torsional stiffness of the convex rear enclosure according to claim 1, wherein: The reinforcing member includes a third reinforcing member (5). The third reinforcing member (5) includes a third cavity (51). The third reinforcing member (5) is disposed in the longitudinal beam cavity (21), and the outer wall surface of the third reinforcing member (5) is attached to the rear longitudinal beam (2) and the rear outer panel (1).

6. The structure for enhancing the torsional stiffness of the convex rear enclosure according to claim 1, wherein: The distance that the lower rear cross beam (6) exceeds the bending point (8) is not less than 20 mm.

7. The structure for enhancing the torsional stiffness of the convex rear enclosure according to claim 1, wherein: The rear outer panel (1) includes a bending section (11); Along the length direction of the lower rear cross beam (6), a weight reduction hole (61) is provided at the portion where the lower rear cross beam (6) is attached to the bending section (11).

8. The structure for enhancing the torsional stiffness of the convex rear enclosure according to claim 1, wherein: Reinforcing ribs are provided at the overlapping portion of the lower rear cross beam (6) and the rear longitudinal beam (2).

9. A white body in white, characterized in that, It includes: A structure for enhancing the torsional stiffness of the convex rear enclosure according to any one of claims 1-8; A floor bulge (7) which is welded to the lower rear cross beam (6).

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