CCB profile support

Abstract

The invention discloses a CCB profile support which comprises a mounting support and a main pipe. The connecting surface of the mounting bracket extends towards the main pipe to form a connecting sheet; the connecting piece is located on the upper surface of the main pipe and connected with the edge of the main pipe through a side face welding seam. The side welding seam is arranged in the axis direction of the main pipe and is parallel to the force application direction. End face welding seams are further arranged on the connecting faces and the side faces of the main pipes and are perpendicular to the side face welding seams; when acting force is applied to the mounting support, the connecting piece does not apply acting force to the upper surface of the main pipe, meanwhile, after the side welding seams are stressed, the stress is transmitted to the end face welding seams, and the stress of the mounting support and the main pipe is shared by the end face welding seams. A connecting piece extends on the mounting bracket and is connected with the main pipe through a side welding seam, and the arrangement direction of the side welding seam is parallel to the forward force application direction; in the force application process, the stress of the side face welding seams is shared by the end face welding seams of the connecting main pipe and the mounting support, so that the collision resistance of the CCB support is effectively enhanced, and the driving safety coefficient is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle manufacturing, and in particular relates to a CCB profile bracket. Background Art

[0002] During the vehicle assembly process, the CCB bracket (instrument panel bracket) serves as the main carrier of the vehicle instrument panel, steering system and other components; the vehicle instrument panel is fixed to the vehicle mounting bracket through the CCB bracket, and the steering system is fixed to the main pipe of the instrument panel. Therefore, the structure of the CCB bracket will directly affect the vehicle's journey comfort, especially the vehicle's NVH (noise, vibration and harshness) performance.

[0003] In the prior art, CCB brackets are basically formed by welding the receiving main pipe and the mounting bracket. The specific welding method is as shown in the attached Figure 1 to Figure 2 As shown, the end of the main pipe is welded to the outer end face of the mounting bracket, and the outer end face is the connection face after welding. It is found in the test and actual use that when the vehicle is hit by a positive (parallel to the direction in which the main pipe is set) or a biased (at an angle to the direction in which the main pipe is set) collision, the welding part will break, causing the main pipe to separate from the mounting bracket. Once the mounting bracket breaks from the main pipe, it will affect the installation equipment such as the airbag, which will be very detrimental to the safety of the user and the driver; and after the collision, the CCB bracket and other accessories are usually unable to be repaired and can only be replaced, which also increases the cost of manufacturing and use. The reason is that in order to meet the lightweight requirements, the mounting bracket usually uses aluminum profiles or aluminum alloy profiles. After welding, the metallographic structure of the aluminum material changes in the heat-affected zone of the profile, the local material becomes brittle, and the welding residual stress and residual deformation cause its stiffness and overall strength to drop by 60%, so it is easy to break at the welding position after a collision.

[0004] In order to solve the passive safety problem after a collision occurs during vehicle driving, designing a CCB profile bracket is an important technical problem that technical personnel in this field need to solve. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems existing in the prior art and to provide a CCB profile bracket.

[0006] The purpose of the present invention is achieved through the following technical solutions: CCB profile bracket, including an installation bracket and a main pipe; a connecting piece extends from the connecting surface of the installation bracket towards the main pipe; the connecting piece is located on the upper surface of the main pipe, and the connecting piece is connected to the edge of the main pipe through a side weld; the side weld is arranged along the axial direction of the main pipe and is parallel to the force application direction; an end face weld is also arranged between the connecting surface and the side surface of the main pipe, and the end face weld is perpendicular to the side weld; when a force is applied to the installation bracket, the connecting piece does not apply a force to the upper surface of the main pipe, and at the same time, after the side weld is stressed, the stress will be transmitted to the end face weld, and the end face weld will share the stress of the installation bracket and the main pipe.

[0007] Preferably, there are two connecting pieces, and a side weld is also formed between the connecting piece located on the lower surface of the main pipe and the main pipe; the side weld and the end face weld are arranged in a U shape on the side of the installation bracket.

[0008] Preferably, the installation bracket is in a hollow L shape, and a first reinforcing rib is arranged inside it; a second reinforcing rib is arranged on the inner side of the installation bracket.

[0009] Preferably, the end of the main pipe penetrates through the installation bracket, and the end of the main pipe is located inside the installation bracket and forms a Z shape in combination with the installation bracket.

[0010] Preferably, a gap is provided between the upper surface of the main pipe and the through hole of the installation bracket.

[0011] Preferably, the overlapping area between the installation bracket and the main pipe is 23% ± 2%.

[0012] Preferably, the end of the connecting piece located on the lower surface of the main pipe is connected to the main pipe through a front weld.

[0013] Preferably, the side weld, the end face weld, and the front weld all use aluminum alloy as the welding material and are welded by a manipulator at a welding speed of 60 ± 10 cm / min and a welding current of 180 ± 30 A. Preferably, the end of the connecting piece 11 located on the upper surface of the main pipe 2 is connected to the main pipe 2 through a front weld 213; and the strength of this front weld 213 is lower than the strength of the main pipe 2 and the side weld 211.

[0014] The advantages of the technical solution of the present invention are mainly reflected in: A connecting piece is extended on the mounting bracket, and the main pipe and the connecting piece are connected by a side weld, and the setting direction of the side weld is parallel to the positive force direction; at the same time, during the force application process, the end face weld connecting the main pipe and the mounting bracket shares the force of the side weld, so as to effectively enhance the anti-collision ability of the CCB bracket and improve the driving safety factor; The end of the main pipe is passed through part of the mounting bracket to increase the overlapping area of ​​the main pipe and the mounting bracket, thereby enhancing the assembly reliability of the two, while reducing the local pressure on the main pipe and the mounting bracket during the collision process, and improving the deformation resistance of the CCB bracket; The height of the through hole of the mounting bracket is designed to be slightly higher than the height of the main pipe, so that the mounting bracket will not immediately act on the main pipe after being subjected to force collision, thereby reducing the degree of deformation of the main pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : Background technology structure diagram of the present invention; Figure 2 : Front view of the background technology of the present invention; Figure 3 : An improved structural diagram of the present invention; Figure 4 : A front view of an improvement of the present invention; Figure 5 : A structural diagram of a preferred embodiment of the present invention; Figure 6 : A front view of a preferred embodiment of the present invention; Figure 7 : An improved collision test contour map of the present invention; Figure 8 : Contour map of collision experiment of preferred embodiment of the present invention. DETAILED DESCRIPTION

[0016] The purpose, advantages and features of the present invention will be illustrated and explained by the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0017] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0018] The present invention discloses a CCB profile bracket, comprising: Figures 1 to 8 The mounting bracket 1 and the main pipe 2 shown. Taking into account the lightweight requirement, it is preferred in the present invention that the mounting bracket 1 and the main pipe 2 are both made of aluminum alloy material; in other embodiments, both can also be made of materials such as steel or steel alloy, and the material of the mounting bracket 1 and the main pipe 2 is not limited here. Furthermore, the mounting bracket 1 is hollow L-shaped, and a first reinforcing rib 101 is arranged inside it; a second reinforcing rib 102 is arranged on the inner side of the mounting bracket 1. The first reinforcing rib 101 and the second reinforcing rib 102 increase the connection reliability and load-bearing capacity of the mounting bracket 1, while meeting the lightweight requirement. In addition, a mounting hole 120 is formed on the mounting plate 12 in the mounting bracket 1 that is parallel to the main pipe 2.

[0019] like Figure 5 to Figure 6 As shown, in a preferred embodiment of the present invention, the connection surface 10 of the mounting bracket 1 extends toward the main pipe 2 with a connecting piece 11, and there is at least one connecting piece 11, and this connecting piece 11 is located on the upper surface of the main pipe 2. The connecting piece 11 is connected to the edge of the main pipe 2 through a side weld 211. Further, the side weld 211 is arranged along the length direction of the main pipe 2 and is parallel to the force application direction. Figures 1 to 4 The difference between the CCB profile bracket in the prior art shown is that the forward weld 213 between the main pipe 2 and the mounting bracket 1 perpendicular to the force direction is cancelled, and the side weld 211 is added. At the same time, the connecting surface 10 and the side of the main pipe 2 are also provided with an end weld 212, and the end weld 212 is perpendicular to the side weld 211. A connecting piece extends on the mounting bracket, and the main pipe and the connecting piece are connected by a side weld, and the side weld is set in a direction parallel to the forward force direction; at the same time, during the force application process, the end weld connecting the main pipe and the mounting bracket shares the force of the side weld, so as to effectively enhance the anti-collision ability of the CCB bracket and improve the driving safety factor.

[0020] Further, there are two connecting pieces 11, and a side weld 211 is also formed between the connecting piece 11 on the lower surface of the main pipe 2 and the main pipe 2. The side weld 211 and the end face weld 212 are arranged in a U shape on the side of the mounting bracket 1. The connecting pieces 11 are arranged on both the upper and lower surfaces of the main pipe 2 to define the installation position of the main pipe 2 through the two connecting pieces 11, and the reliable connection between the two is realized by the side weld 211.

[0021] As Figure 6 shown, the end of the main pipe 2 penetrates through the mounting bracket 1, and preferably, a gap is provided between the upper surface of the main pipe 2 and the through hole of the mounting bracket 1. The height of the through hole of the mounting bracket 1 is slightly higher than the height of the main pipe 2, so that the mounting bracket 1 will not immediately act on the main pipe 2 after being subjected to a force collision, reducing the deformation degree of the main pipe 2. Further, the end of the main pipe 2 is located inside the mounting bracket 1 and forms a Z shape with the mounting bracket 1. The overlapping area between the mounting bracket 1 and the main pipe 2 is 23% ± 2%. By increasing the contact area between the mounting bracket 1 and the main pipe 2, the assembly reliability of the two is strengthened, and at the same time, the pressure received by the two during the collision is reduced to reduce the deformation degree of the two.

[0022] As Figure 3 to Figure 4 shown, it is an improvement made to the CCB profile bracket based on the background technology. The improvement is that the end of the main pipe 2 penetrates through the mounting bracket 1, and the two connecting pieces 11 on the mounting bracket 1 are connected to the main pipe 2 through the front weld 213, the side weld 211 and the end face weld 212. The improvement is to increase the contact area between the mounting bracket 12 and the main pipe 2 to improve the connection reliability between the two, and at the same time reduce the pressure of the mounting bracket 1 after being subjected to a force collision, attempting to avoid the situation that the main pipe 2 is torn or broken. However, combining Figure 7 shown test results show that when the mounting bracket 1 is subjected to a force collision and displaced by 20 mm, the connecting piece 11 on the upper surface of the main pipe 2 will move upward around its connection point with the mounting bracket 1 under the drive of the acting force, and during this process, the front weld 213 will also be driven to displace synchronously; while the main pipe 2 cannot displace synchronously with the connecting piece 11 on its upper surface under the action of the two side welds 211, the end face weld 212 and a front weld 213 on its lower surface, so the effective plastic strain value in the heat affected zone on the upper surface of the main pipe 2 will reach Figure 7 shown 0.114, exceeding the limit value of 0.1. The proportional application of this effective plastic strain value to the actual product will cause the main pipe 2 to be torn, resulting in the damage of the CCB profile bracket.

[0023] like Figure 5 to Figure 6 The figure is a further improvement based on the above improvement, which is also the structure of the present invention. In this improvement, the connecting piece 11 is connected to the main pipe 2 through the side weld 211, that is, the overall structure has four side welds 211, and the four side welds 211 are located on four parallel edges of the main pipe 2. Figure 8 The test results shown in the figure show that when the mounting bracket 1 is displaced 20mm by collision, the connecting piece 11 only applies force to the edge of the main pipe 2, but not to the upper surface of the main pipe 2, and the force will be transmitted from the side weld 211 to the end weld 212; that is, the side weld 211 and the end weld 212 share the force of the mounting bracket 1 and the main pipe 2. Therefore, the experimental test shows that when the main pipe 2 is subjected to force, the effective plastic strain value of the heat-affected zone of the side weld 211 will first reach the value shown in FIG. Figure 8 The value of 0.104 shown in the figure exceeds the limit value of 0.1, and the fracture first occurs at the end of the side weld 211 away from the mounting bracket 1, and the fracture area occupies a very small part of the main body of the main pipe 2. The effective plastic strain value of the upper surface of the main pipe 2 is less than 0.012, which does not exceed the limit value of 0.1. This effective plastic strain ratio is applied to actual products and it is found that the main part of the upper surface of the main pipe 2 will not be torn at this time. Therefore, the structure disclosed by the present invention has strong anti-collision and anti-tearing performance, which can effectively protect and improve the passive safety factor of the vehicle after a collision during driving.

[0024] In addition, in other embodiments, the end of the connecting piece 11 located on the lower surface of the main pipe 2 is connected to the main pipe 2 through a front weld 213 to enhance the connection reliability between the mounting bracket 1 and the main pipe 2 .

[0025] Furthermore, in the present invention, the side weld 211, the end weld 212 and the front weld 213 are preferably made of aluminum alloy as solder and are welded by a manipulator at a welding speed of 60±10 cm / min and a welding current of 180±30 A. The length of the side weld 211 is preferably 20±2 mm; the length of the end weld 212 is preferably 25±2 cm; and the length of the front weld 213 is preferably 30±2 mm.

[0026] In another embodiment, the end of the connecting piece 11 located on the upper surface of the main pipe 2 is preferably connected to the main pipe 2 through a front weld 213; and the strength of the front weld 213 is lower than the strength of the main pipe 2 and the side weld 211. In this embodiment, when the mounting bracket 1 is subjected to force, the connecting piece 11 and the front weld 213 located on the upper surface of the main pipe 2 will be displaced relative to the main pipe 2, but because the strength of the front weld 213 is much lower than that of the main pipe 2, the front weld 213 will be separated from the main pipe first during the displacement process, and will not tear the main pipe.

[0027] The assembly process of the present invention is briefly described below: S1, inserting the end of the main pipe 2 into the through hole of the mounting bracket 1, and the bottom surface of the gripping pipe 2 is in contact with the bottom of the through hole; S2, ensuring the verticality of the main pipe 2 and the mounting bracket 1, and preheating the solder; S3, aluminum alloy solder is welded by a robot at a welding speed of 60±10cm / min and a welding current of 180±30A, so that the connecting piece 11 and the main pipe 2, and the connecting surface 10 of the mounting bracket 1 and the main pipe 2 are welded; a side weld 211 and an end weld 212 are formed.

[0028] There are many implementation methods of the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims

1. CCB profile bracket, characterized by: It includes an installation bracket (1) and a main pipe (2); a connecting piece (11) extends from the connecting surface (10) of the installation bracket (1) towards the main pipe (2); the connecting piece (11) is located on the upper surface of the main pipe (2), and the connecting piece (11) is connected to the edge of the main pipe (2) through a side weld (211); the side weld (211) is arranged along the axial direction of the main pipe (2) and is parallel to the force application direction; an end weld (212) is also provided between the connecting surface (10) and the side surface of the main pipe (2), and the end weld (212) is perpendicular to the side weld (211); when a force is applied to the installation bracket (1), the connecting piece (11) does not apply a force to the upper surface of the main pipe (2), and at the same time, after the side weld (211) is stressed, the stress will be transmitted to the end weld (212), and the end weld (212) will share the stress of the installation bracket (1) and the main pipe (2).

2. The CCB profile bracket according to claim 1, characterized in that: There are two connecting pieces (11), and a side weld (211) is also formed between the connecting piece (11) located on the lower surface of the main pipe (2) and the main pipe (2); the side weld (211) and the end weld (212) are arranged in a U-shape on the side surface of the installation bracket (1).

3. The CCB profile bracket according to claim 1, characterized in that: The installation bracket (1) is in a hollow L shape, and a first reinforcing rib (101) is arranged inside it; a second reinforcing rib (102) is arranged on the inner side of the installation bracket (1).

4. The CCB profile bracket according to claim 1, characterized in that: The end of the main pipe (2) penetrates through the installation bracket (1), and the end of the main pipe (2) is located inside the installation bracket (1) and forms a Z shape in combination with the installation bracket (1).

5. The CCB profile bracket according to claim 4, characterized in that: A gap is provided between the upper surface of the main pipe (2) and the through hole of the installation bracket (1).

6. The CCB profile bracket according to claim 1, characterized in that: The overlapping area of the installation bracket (1) and the main pipe (2) is 23% ± 2%.

7. The CCB profile bracket according to claim 1, characterized in that: The end of the connecting piece (11) located on the lower surface of the main pipe (2) is connected to the main pipe (2) through a front weld (213).

8. The CCB profile bracket according to claim 7, characterized in that: The side weld (211), the end weld (212), and the front weld (213) all use aluminum alloy as the welding material and are welded by a manipulator at a welding speed of 60 ± 10 cm / min and a welding current of 180 ± 30 A.

9. The CCB profile bracket according to claim 8, characterized in that: The end of the connecting piece (11) located on the upper surface of the main pipe (2) is connected to the main pipe (2) through a front weld (213); and the strength of this front weld (213) is lower than the strength of the main pipe (2) and the side weld (211).

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