Rear wall connecting structure and body-in-white

Abstract

This application relates to the field of commercial vehicle body-in-white technology, and particularly to a rear bulkhead connection structure and a body-in-white. The rear bulkhead connection structure includes a rear bulkhead and a floor. Specifically, the rear bulkhead includes a rear bulkhead outer panel; the floor includes floor longitudinal beams and a floor rear transverse beam, the floor rear transverse beam being connected to the floor longitudinal beams, and the floor rear transverse beam being connected to the rear bulkhead outer panel. This application provides a rear bulkhead connection structure and a body-in-white to solve the problem in related technologies where the connection strength between the rear bulkhead longitudinal beams and the floor is weak, resulting in insufficient torsional stiffness of the body-in-white.

Description

Technical Field

[0001] This application relates to the field of commercial vehicle body-in-white technology, and particularly to a rear-mounted connection structure and body-in-white. Background Technology

[0002] The torsional stiffness of the body-in-white is an important indicator for measuring the NVH performance of a car. The connection strength between the floor and the rear bulkhead has a significant impact on the torsional stiffness of the body-in-white.

[0003] In existing technologies, the floor and rear longitudinal beams are typically connected via joints, and then the floor flange is welded to the outer rear panel. However, when the floor and rear longitudinal beams are connected via joints, the rear longitudinal beams are not directly connected to the main load-bearing component—the floor longitudinal beams. Therefore, the connection strength between the rear panel and the floor is insufficient. Furthermore, the weld points when welding the floor flange to the outer rear panel are generally a single row of weld points, resulting in low connection strength. In addition, the rear longitudinal beams are heavy, which is not conducive to lightweight design. Summary of the Invention

[0004] This application provides a rear connecting structure and a body-in-white to solve the problem in the related art where the connection strength between the rear longitudinal beam and the floor is weak, resulting in insufficient torsional stiffness of the body-in-white.

[0005] To achieve the above objectives, in a first aspect, embodiments of this application provide a rear perimeter connection structure, which includes:

[0006] Rear enclosure, including the rear enclosure outer panel;

[0007] The floor includes floor longitudinal beams and floor rear crossbeams, wherein the floor rear crossbeams are connected to the floor longitudinal beams and the floor rear outer panel.

[0008] In some embodiments, it further includes:

[0009] A rear reinforcement plate is disposed on the side of the rear outer panel facing the rear crossbeam of the floor, and the rear reinforcement plate protrudes to the side away from the rear outer panel, forming a cavity between the rear outer panel and the rear outer panel.

[0010] In some embodiments, the rear crossbeam of the floor includes a first contact surface and a second contact surface, the first contact surface being in contact with the rear outer panel, and the second contact surface being disposed on the side where the longitudinal beam of the floor is located;

[0011] The first contact surface includes a first welding point and a second welding point, and the first welding point and the second welding point are respectively located on the upper and lower sides of the floor.

[0012] In some embodiments, a top surface is also connected between the first contact surface and the second contact surface. The second contact surface is an inclined surface, and one end of the second contact surface away from the top surface extends away from the first contact surface to the side connected to the floor.

[0013] In some embodiments, the rear crossbeam of the floor is hollow and has through holes.

[0014] In some embodiments, the rear crossbeam of the floor includes a first contact surface and a second contact surface, the first contact surface being in contact with the rear outer panel, and the second contact surface being disposed on the side where the longitudinal beam of the floor is located;

[0015] The through hole is disposed on the second contact surface.

[0016] In some embodiments, there are multiple through holes, which are spaced apart on the rear crossbeam of the floor along the length of the floor.

[0017] In some embodiments, it further includes:

[0018] A connecting plate, which is connected to the rear crossbeam and longitudinal beam of the floor;

[0019] The floor longitudinal beam includes a longitudinal beam connecting part, which is fitted to the floor rear crossbeam and is welded to the floor rear crossbeam.

[0020] In some embodiments, the connecting plate is attached to the bottom of the floor's rear crossbeam and longitudinal beams, and is connected to the floor.

[0021] Secondly, a body-in-white is provided, comprising:

[0022] One of the rear enclosure connection structures described above.

[0023] The beneficial effects of the technical solution provided in this application include:

[0024] This application provides a rear enclosure connection structure and a body-in-white. By adding a rear floor crossbeam to the floor, which connects to the floor longitudinal beam to form a frame structure, and allowing the rear outer panel to be directly connected to the rear floor crossbeam, joint connections are avoided. This improves the connection strength between the rear enclosure and the floor, enabling the force from the cab roof to be directly transmitted to the floor load-bearing structure through the rear enclosure structure. While improving the connection strength, the torsional stiffness is also effectively increased. Therefore, this solves the problem of insufficient torsional stiffness of the body-in-white due to the weak connection strength between the rear longitudinal beam and the floor in related technologies. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the longitudinal beams and the rear transverse beams of the floor in the rear enclosure connection structure provided in the embodiments of this application;

[0027] Figure 2 This is a schematic diagram of the rear enclosure connection structure provided in an embodiment of this application;

[0028] Figure 3 for Figure 2 Sectional view at point AA;

[0029] Figure 4 for Figure 2 Sectional view at point BB;

[0030] Figure 5 This is a schematic diagram of the structure of the rear outer panel and the rear reinforcing plate in the rear connection structure provided in the embodiments of this application;

[0031] Figure 6 A schematic diagram showing the connection between the rear outer panel, the rear reinforcing plate, and the rear crossbeam of the floor in the rear connection structure provided in this application embodiment;

[0032] Figure 7 This is a schematic diagram of a second embodiment of the connecting plate provided in this application.

[0033] In the diagram: 1. Rear outer panel; 11. Cavity; 2. Floor; 3. Floor longitudinal beam; 31. Longitudinal beam connection; 4. Rear floor crossbeam; 41. First contact surface; 411. First welding point; 412. Second welding point; 42. Second contact surface; 43. Top surface; 44. Through hole; 45. First flange; 46. Second flange; 47. Third welding point; 48. Fourth welding point; 5. Rear reinforcing plate; 6. Connecting plate. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] This application provides a rear enclosure connection structure that can solve the problem in related technologies where the connection strength between the rear longitudinal beam and the floor is weak, resulting in insufficient torsional stiffness of the body-in-white.

[0036] See Figures 1 to 7 As shown, this application embodiment provides a rear enclosure connection structure, including a rear enclosure and a floor 2. The rear enclosure includes a rear outer panel 1, and the floor 2 includes floor longitudinal beams 3 and floor rear transverse beams 4. Specifically, in conjunction with... Figure 1 As shown, the rear crossbeam 4 of the floor is connected to the longitudinal beam 3 of the floor, and then combined with... Figure 2 As shown, the rear floor beam 4 is connected to the rear outer panel 1. The floor longitudinal beam 3 and the rear floor beam 4 form a rectangular frame structure. The floor is directly connected to the rear panel through the rear floor beam 4, rather than indirectly connected through a joint, thus ensuring the connection strength.

[0037] The rear enclosure connection structure provided in this application embodiment adds a rear floor crossbeam 4 to the floor 2. The rear floor crossbeam 4 is connected to the floor longitudinal beam 3 to form a frame structure, and the rear outer panel 1 and the rear floor crossbeam 4 can be directly connected, avoiding joint connections. This improves the connection strength between the rear enclosure and the floor 2, allowing the force from the cab roof to be directly transmitted to the floor load-bearing structure through the rear enclosure structure. While improving the connection strength between the two, it also effectively improves the torsional stiffness. Therefore, it can solve the problem of insufficient torsional stiffness of the body-in-white due to the weak connection strength between the rear longitudinal beam and the floor in related technologies.

[0038] In some alternative embodiments, see Figure 2 and Figure 3 As shown, the rear enclosure connection structure also includes a rear enclosure reinforcing plate 5. Specifically, the rear enclosure reinforcing plate 5 is disposed on the side of the rear outer panel 1 facing the rear floor beam 4, from... Figure 3 As can be seen from the sectional view shown, the rear reinforcement plate 5 is located between the rear outer plate 1 and the rear floor beam 4.

[0039] Furthermore, combined Figure 3 As shown, the rear bulkhead reinforcing plate 5 protrudes away from the rear bulkhead outer plate 1, forming a cavity 11 between it and the rear bulkhead outer plate 1. The cavity 11 formed between the rear bulkhead reinforcing plate 5 and the rear bulkhead outer plate 1 replaces the original rear bulkhead longitudinal beam, eliminating the need to consider the connection between the floor and the rear bulkhead longitudinal beam. The rear bulkhead reinforcing plate 5 and the rear floor crossbeam 4 can be directly connected, allowing the force from the cab roof to be directly transmitted to the floor load-bearing structure through the cavity 11 structure of the rear bulkhead. This improves connection strength and also achieves a lightweight design.

[0040] Combined Figure 5 As shown, Figure 5 This is a sectional view of the rear outer panel 1 and the rear reinforcing panel 5, specifically a top view. Figure 3 , Figure 4 This is a vertical perspective. Specifically, combined with... Figure 5 As shown, the rear reinforcing plate 5 protrudes to the side away from the rear outer plate 1, and its two ends are fitted onto the rear outer plate 1 and welded to the rear outer plate 1; a cavity 11 is formed between the protruding rear reinforcing plate 5 and the rear outer plate 1 to replace the original rear longitudinal beam, which facilitates the connection between the rear and the floor rear crossbeam 4, and at the same time achieves weight reduction.

[0041] Combined Figure 6 As shown, Figure 6 This is a sectional view of the connection point between the rear outer panel 1, the rear reinforcing plate 5, and the rear floor beam 4. The view is a top-down perspective, and is in contrast to... Figure 3 , Figure 4 This is a vertical perspective. Specifically, because the rear bulkhead reinforcing plate 5 protrudes away from the rear bulkhead outer plate 1 to form a cavity 11, the floor rear crossbeam 4 also protrudes away from the rear bulkhead outer plate 1 to avoid the cavity 11. At this time, the floor rear crossbeam 4 is directly connected to the rear bulkhead, avoiding joint connections, improving connection strength, and thus improving the torsional strength of the body-in-white.

[0042] Furthermore, the rear crossbeam 4 of the floor is welded to the rear outer panel 1 and / or the rear reinforcing plate 5, in combination. Figure 6 As shown, the rear crossbeam 4 of the floor is welded to the outer rear panel 1, with one of the welding points being the third welding point 47; similarly... Figure 6 As shown, the rear crossbeam 4 of the floor is welded to the rear reinforcing plate 5 and the rear outer plate 1. One of the welding points is the fourth welding point 48. This part includes at least three plates, namely the rear outer plate 1, the rear crossbeam 4 of the floor, and the rear reinforcing plate 5. Different welding methods and welding area distributions can be selected according to actual strength requirements.

[0043] In some alternative embodiments, see Figure 3 As shown, the rear crossbeam 4 of the floor includes a first contact surface 41 and a second contact surface 42. The first contact surface 41 is connected to the rear outer panel 1, and the second contact surface 42 is disposed on the side where the floor longitudinal beam 3 is located. Specifically, the first contact surface 41 is used for welding to the rear outer panel 1, and the second contact surface 42 is used for welding to the floor 2.

[0044] Preferably, combined with Figure 3 As shown, the floor rear beam 4 also includes a top surface 43, which connects the first contact surface 41 and the second contact surface 42, serving as a transition between the two surfaces. Specifically, the second contact surface 42 is an inclined surface, and one end of the second contact surface 42 away from the top surface 43 extends towards the side away from the first contact surface 41, as shown... Figure 3The extension extends to connect with the floor 2. The rear crossbeam 4 of the floor is hollow inside and gradually increases in size from the side where the top surface 43 is located to the side away from the top surface 43. The first contact surface 41 is connected to the rear outer panel 1, and the inclined second contact surface 42 forms a tension force on the floor 2, which strengthens the connection strength between the rear outer panel 1 and the floor 2.

[0045] Furthermore, the first contact surface 41 includes a first welding point 411 and a second welding point 412, and the first welding point 411 and the second welding point 412 are respectively located on the upper and lower sides of the floor 2.

[0046] It should be noted that, Figure 3 As shown Figure 2 The sectional view at section AA does not mean that the first welding point 411 and the second welding point 412 are only located at section AA; the rear crossbeam 4 of the floor is welded to the rear outer panel 1 through the first contact surface 41 and has two rows of welding points, which greatly increases the connection strength between the rear outer panel 1 and the floor 2.

[0047] Optionally, the top surface 43 may be as follows: Figure 3 The arc surface shown, or as shown Figure 4 The plane shown; when the top surface 43 is as shown Figure 4 When the plane is shown, the transition between the top surface 43 and the first contact surface 41 and the second contact surface 42 should be an arc surface.

[0048] Optionally, combined Figure 2 and Figure 3 As shown, the rear enclosure connection structure also includes a rear enclosure reinforcing plate 5. Specifically, the rear enclosure reinforcing plate 5 is disposed on the side of the rear outer panel 1 facing the rear floor beam 4, from... Figure 3 As can be seen from the sectional view shown, the rear reinforcement plate 5 is located between the rear outer plate 1 and the rear floor beam 4.

[0049] Furthermore, the first contact surface 41 includes a first welding point 411 and a second welding point 412, and the first welding point 411 and the second welding point 412 are respectively located on the upper and lower sides of the floor 2. Specifically, the first contact surface 41 is connected to the rear reinforcing plate 5 through the first welding point 411, and is connected to the rear outer plate 1 through the second welding point 412.

[0050] Combination Figure 3 As shown, the rear outer panel 1 bends towards the side where the floor rear crossbeam 4 is located at the end away from the top surface 43, and with this bending point as the dividing line, the upper part forms a cavity 11 with the rear reinforcing plate 5, and the lower part is directly attached to the floor rear crossbeam 4; in this way, the floor rear crossbeam 4 is welded to both the rear outer panel 1 and the rear reinforcing plate 5, ensuring the connection strength between the floor rear crossbeam 4 and the rear enclosure. At the same time, the floor rear crossbeam 4 and the rear enclosure form a double row of weld points, which improves the connection strength.

[0051] Furthermore, combined Figure 3 As shown, the lower half of the rear outer panel 1 is directly attached to the rear floor beam 4. The rear floor beam 4 includes a first flange 45, which can extend towards or away from the top surface 43 to provide a welding position for the second welding point 412. Preferably, the first flange 45 is as follows: Figure 3 As shown, it extends away from the top surface 43, increasing the contact area between the floor rear beam 4 and the rear outer panel 1, thus strengthening the connection between the two.

[0052] Optionally, additional solder joints can be added as needed.

[0053] In some alternative embodiments, see Figure 2 and Figure 4 As shown, the rear crossbeam 4 of the floor is provided with through holes 44 to reduce the weight of the rear crossbeam 4 of the floor.

[0054] Preferably, the rear crossbeam 4 of the floor includes a first contact surface 41 and a second contact surface 42. The first contact surface 41 is in contact with the rear outer panel 1, and the second contact surface 42 is disposed on the side where the floor longitudinal beam 3 is located, and the through hole 44 is disposed on the second contact surface 42.

[0055] Since the first contact surface 41 needs to be welded to the rear outer panel 1 and the rear reinforcing plate 5, in order to avoid affecting the welding surface, it is preferable to set the through hole 44 on the second contact surface 42 to reduce weight. At the same time, the first welding point 411 and the second welding point 412 can also be operated through the through hole 44 to weld the floor rear crossbeam 4 to the rear outer panel 1 and / or the rear reinforcing plate 5.

[0056] Combination Figure 4 As shown, Figure 4 for Figure 2 The cross-sectional view at point BB shows a through hole 44 without a rear reinforcing plate 5. Preferably, this area also has two rows of weld points, located at the upper and lower ends of the first contact surface 41 and on both sides of the floor 2.

[0057] Furthermore, combined Figure 4 As shown, with floor 2 as the dividing line, the rear crossbeam 4 of the floor above floor 2 includes a first contact surface 41 and a second contact surface 42. The first contact surface 41 is connected to the rear outer panel 1, and the second contact surface 42 is set towards the side where the floor longitudinal beam 3 is located. Specifically, the first contact surface 41 is used to weld to the rear outer panel 1, and the second contact surface 42 is used to weld to the floor 2.

[0058] Below the floor 2, the rear crossbeam 4 of the floor includes a first flange 45 and a second flange 46, wherein the first flange 45 is fitted with the first contact surface 41 and welded together to increase the contact area between the rear crossbeam 4 of the floor and the rear outer panel 1, and the second flange 46 is fitted with the floor 2.

[0059] Optionally, the second contact surface 42 can be as follows: Figure 3 and Figure 4 As shown, the rear beam 4 of the floor is integrated with the floor 2. The connection between the rear beam 4 and the floor 2 is achieved by the second flange 46 adhering to the floor 2. That is, the rear beam 4 is part of the floor 2. It extends from the second contact surface 42 to the rear outer panel 1, bends to the top surface 43, and then bends again to form the first contact surface. It is welded to the rear outer panel 1 and / or the rear reinforcing plate 5. Then it extends along the rear outer panel 1 in a direction away from the top surface 43 to form the first flange 45, and then bends to form the second flange 46, which is adhered to the lower surface of the floor 2 and welded. The transition between the rear beam 4 and the floor 2 is smooth, which is conducive to the transmission of force.

[0060] Optionally, combined Figure 2 As shown, there are multiple through holes 44, which are spaced apart along the length of the rear crossbeam 4 of the floor, effectively reducing the weight of the rear crossbeam 4 of the floor.

[0061] In some alternative embodiments, see Figure 3 and Figure 7 As shown, the rear enclosure connection structure also includes a connecting plate 6, which is connected to the rear floor beam 4 and the longitudinal floor beam 3 to strengthen the connection between the rear floor beam 4 and the longitudinal floor beam 3. Specifically, in conjunction with Figure 1 As shown, there is a connection point where the floor rear crossbeam 4 connects to the floor longitudinal beam 3. A connecting plate 6 should be installed at the connection point to strengthen the connection between the two.

[0062] Furthermore, in one embodiment, combined with Figure 3 As shown, floor longitudinal beam 3 and Figure 3 The floor 2 shown is on the same plane, and the connecting plate 6 is Z-shaped and is attached to the bottom end of the floor rear beam 4, and extends from the floor rear beam 4 to the floor longitudinal beam 3. The connecting plate 6 should cover the connection point where the floor rear beam 4 and the floor longitudinal beam 3 are connected, preferably completely covering the connection point.

[0063] Furthermore, combined Figure 3 As shown, the rear crossbeam 4 of the floor includes a second flange 46, which extends away from the rear outer panel 1. The connecting plate 6 should be located on the side of the second flange 46 away from the floor 2 and extend beyond the location of the second flange 46, and then welded to the floor 2. Specifically, the connecting plate 6 is welded to the longitudinal beam 3 of the floor.

[0064] In another embodiment, optionally, combined with Figure 7 As shown, the bottom end of the floor longitudinal beam 3 is parallel to the bottom end of the floor rear crossbeam 4. Specifically, the floor longitudinal beam 3 includes a longitudinal beam connecting part 31, which is fitted to the floor rear crossbeam 4 and welded to it. At this time, the connecting plate 6 is as follows... Figure 7 As shown, a straight plate is attached to the bottom end of the floor rear crossbeam 4 and the floor longitudinal beam 3, preferably welded to both the floor rear crossbeam and the floor longitudinal beam 3.

[0065] This application also provides a body-in-white comprising a rear bulkhead connection structure as described in any of the above.

[0066] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0067] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0068] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A rear wall connecting structure characterized by comprising: It includes: The rear enclosure includes the rear outer panel (1); Floor (2), including floor longitudinal beams (3) and floor rear crossbeams (4), wherein the floor rear crossbeams (4) are connected to the floor longitudinal beams (3) and the floor rear crossbeams (4) are connected to the rear outer panel (1); The floor rear crossbeam (4) includes a first contact surface (41) and a second contact surface (42). The first contact surface (41) is in contact with the rear outer panel (1), and the second contact surface (42) is located on the side where the floor longitudinal beam (3) is located. The first contact surface (41) includes a first welding point (411) and a second welding point (412), and the first welding point (411) and the second welding point (412) are respectively located on the upper and lower sides of the floor (2); A top surface (43) is also connected between the first contact surface (41) and the second contact surface (42). The second contact surface (42) is an inclined surface, and the end of the second contact surface (42) away from the top surface (43) extends away from the first contact surface (41) and extends to connect with the floor (2).

2. The back connection structure according to claim 1, wherein It also includes: The rear reinforcement plate (5) is disposed on the side of the rear outer plate (1) facing the floor rear beam (4), and the rear reinforcement plate (5) protrudes away from the rear outer plate (1) and forms a cavity (11) between it and the rear outer plate (1).

3. The rear enclosure connection structure as described in claim 1, characterized in that: The floor rear crossbeam (4) is hollow and has through holes (44).

4. The rear enclosure connection structure as described in claim 3, characterized in that: The floor rear crossbeam (4) includes a first contact surface (41) and a second contact surface (42). The first contact surface (41) is in contact with the rear outer panel (1), and the second contact surface (42) is located on the side where the floor longitudinal beam (3) is located. The through hole (44) is provided on the second contact surface (42).

5. The rear enclosure connection structure as described in claim 4, characterized in that: There are multiple through holes (44), which are spaced apart on the rear crossbeam (4) of the floor along the length direction of the floor.

6. The back connection structure according to claim 1, wherein It also includes: The connecting plate (6) is connected to the floor rear crossbeam (4) and the floor longitudinal beam (3); The floor longitudinal beam (3) includes a longitudinal beam connecting part (31), which is fitted to the floor rear crossbeam (4) and is welded to the floor rear crossbeam (4).

7. The rear enclosure connection structure as described in claim 6, characterized in that: The connecting plate (6) is attached to the bottom of the floor rear beam (4) and the floor longitudinal beam (3) and is connected to the floor (2).

8. A body in white, characterized by It includes: A rear enclosure connection structure as described in any one of claims 1 to 7.

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