Injection-molded double-layer bonded roof fairing structure

Abstract

The utility model belongs to the technical field of automobile parts, and particularly relates to an injection molding double-layer bonding roof fairing structure which comprises a roof fairing body, a main stiffening beam, a right side transverse stiffening beam, a right side longitudinal stiffening beam, a left side longitudinal stiffening beam and a left side transverse stiffening beam. The right longitudinal stiffening beam and the left longitudinal stiffening beam are vertically fixed to the right side and the left side of the surface of the top fairing body respectively, the right transverse stiffening beam and the left transverse stiffening beam are transversely fixed to the right side and the left side of the surface of the top fairing body respectively, and the main stiffening beam is transversely fixed to the top of the surface of the top fairing body. And the left side and the right side of the roof fairing are flanged upwards. The top flow guide cover body has no too many structures, the appearance A surface does not generate structural shrinkage marks, and the top flow guide cover body and the stiffening beams are bonded, so that the aims of attractive appearance, high overall strength, light weight, environmental protection, lower cost and high production efficiency are finally achieved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically relating to an injection-molded double-layer bonded roof fairing structure. Background Technology

[0002] There are several types of existing commercial vehicle roof fairings: 1. Injection molding with tubular beams: This type requires the installation of tubular beams and reinforcing structures on the fairing, resulting in poor precision, appearance, and overall strength; 2. LFI long glass fiber foam: This type has the drawback of thick walls, unstable processes leading to severe appearance defects, heavy weight, environmental pollution, and low production efficiency; 3. Hand lay-up fiberglass: This type has the drawback of thick walls, heavy weight, environmental pollution, and low production efficiency; 4. PDCPD material: Due to molding and strength issues, it is not used for commercial vehicle roof fairings. Therefore, current roof fairings suffer from poor precision, poor strength, heavy weight, environmental pollution during production, and low production efficiency. Utility Model Content

[0003] To address the aforementioned problems in the existing technology, this utility model provides an injection-molded double-layer bonded roof fairing structure. The roof fairing body has minimal structure, and the A-side of the exterior will not exhibit structural shrinkage. By bonding the roof fairing body and the reinforcing beam, the final result achieves an aesthetically pleasing appearance, high overall strength, light weight, environmental friendliness, low cost, and high production efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a double-layer injection-molded roof fairing structure, comprising a roof fairing body, a main reinforcing beam, a right-side transverse reinforcing beam, a right-side longitudinal reinforcing beam, a left-side longitudinal reinforcing beam, and a left-side transverse reinforcing beam. The right-side longitudinal reinforcing beam and the left-side longitudinal reinforcing beam are vertically fixed to the right and left sides of the roof fairing body surface, respectively, and both the right-side longitudinal reinforcing beam and the left-side longitudinal reinforcing beam are located in the middle and bottom of the roof fairing body. The right-side transverse reinforcing beam and the left-side transverse reinforcing beam are transversely fixed to the right and left sides of the roof fairing body surface, respectively, with one end of the right-side transverse reinforcing beam fixed to the middle of the right-side longitudinal reinforcing beam, and the left-side transverse reinforcing beam fixed to the middle of the right-side longitudinal reinforcing beam. One end of the side transverse reinforcing beam is fixed to the middle of the left longitudinal reinforcing beam. The main reinforcing beam is transversely fixed to the top of the surface of the top fairing body, and the top of the right longitudinal reinforcing beam and the top of the left longitudinal reinforcing beam are fixed to the main reinforcing beam. The roof fairing is symmetrical on the left and right sides and the left and right sides are turned up. The right side of the right transverse reinforcing beam and the left side of the left transverse reinforcing beam are respectively adapted to the right side and the left side of the top fairing body. The left side and the right side of the main reinforcing beam are respectively adapted to the right side and the left side of the top fairing body. Glue application grooves are provided on the outer periphery of the back of the main reinforcing beam, the right transverse reinforcing beam, the right longitudinal reinforcing beam, the left longitudinal reinforcing beam and the left transverse reinforcing beam.

[0005] Furthermore, the outer side of the adhesive application groove is provided with an outer shielding rib, and the inner side is provided with an inner shielding rib. The main reinforcing beam, the right transverse reinforcing beam, the right longitudinal reinforcing beam, the left longitudinal reinforcing beam, and the left transverse reinforcing beam are all provided with reinforcing ribs in the middle of their back sides.

[0006] Furthermore, the upper and lower sides of the main reinforcing beam surface are provided with upward-facing second reinforcing flanges.

[0007] Furthermore, the materials used for the top fairing body, main reinforcing beam, right side transverse reinforcing beam, right side longitudinal reinforcing beam, left side longitudinal reinforcing beam, and left side transverse reinforcing beam are all PP+LF30.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: the materials of the top fairing body, main reinforcing beam, right side transverse reinforcing beam, right side longitudinal reinforcing beam, left side longitudinal reinforcing beam and left side transverse reinforcing beam are all PP+LF30, and the walls are thin, so the weight is light; the top fairing body has no too many structures, and the A-side of the appearance will not produce structural shrinkage marks, and the top fairing body and reinforcing beam are bonded together, making the top fairing beautiful in appearance, high in precision, high in strength, and efficient and environmentally friendly in production. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 for Figure 1 Sectional view at point AA;

[0011] Figure 3 for Figure 2 Enlarged view at point B in the middle;

[0012] Figure 4 for Figure 1 Enlarged view at point C;

[0013] Figure 5 for Figure 1 Enlarged view at point D;

[0014] Figure 6 for Figure 1 Enlarged view at point E

[0015] Figure 7 This is a schematic diagram of the back structure of the main reinforcing beam, right side transverse reinforcing beam, right side longitudinal reinforcing beam, left side longitudinal reinforcing beam and left side transverse reinforcing beam after installation of this utility model;

[0016] Figure 8 for Figure 7 Sectional view at FF;

[0017] Figure 9 This is a schematic diagram of the production process of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-9 This utility model provides the following technical solution: a double-layer injection-molded roof fairing structure, including a roof fairing body 1, a main reinforcing beam 2, a right-side transverse reinforcing beam 3, a right-side longitudinal reinforcing beam 4, a left-side longitudinal reinforcing beam 5, and a left-side transverse reinforcing beam 6. The roof fairing body 1 has few structures, so there is no structural shrinkage on the A-side of the exterior, resulting in a more aesthetically pleasing appearance. The right-side longitudinal reinforcing beam 4 and the left-side longitudinal reinforcing beam 5 are vertically fixed to the right and left sides of the surface of the roof fairing body 1, respectively, and both are located in the middle and bottom of the roof fairing body 1. The right-side transverse reinforcing beam 3 and the left-side transverse reinforcing beam 6 are horizontally fixed to the right and left sides of the surface of the roof fairing body 1, respectively, with one end of the right-side transverse reinforcing beam 3 fixed to the middle of the right-side longitudinal reinforcing beam 4 by screws 7, and one end of the left-side transverse reinforcing beam 6 fixed to the middle of the left-side longitudinal reinforcing beam 5 by screws 7. The main reinforcing beam 2 is horizontally fixed to the top of the surface of the roof fairing body 1, and the right-side longitudinal reinforcing beam 4 and the left-side longitudinal reinforcing beam 5 are vertically fixed to the right and left sides of the surface of the roof fairing body 1, respectively. The top of the reinforcing beam 4 and the top of the left longitudinal reinforcing beam 5 are also fixed to the main reinforcing beam 2 by screws 7. The main reinforcing beam 2, the right transverse reinforcing beam 3, the right longitudinal reinforcing beam 4, the left longitudinal reinforcing beam 5, and the left transverse reinforcing beam 6 are fixed to the top fairing body 1, which makes the overall strength of the roof fairing high. Moreover, it is fixed by adhesive bonding, and the production process is environmentally friendly and efficient. The roof fairing is symmetrical from left to right and the left and right sides are turned up. The right side of the right transverse reinforcing beam 3 and the left side of the left transverse reinforcing beam 6 are adapted to the right side and left side of the top fairing body 1, respectively. The left side and right side of the main reinforcing beam 2 are adapted to the right side and left side of the top fairing body 1, respectively. The outer periphery of the back of the main reinforcing beam 2, the right transverse reinforcing beam 3, the right longitudinal reinforcing beam 4, the left longitudinal reinforcing beam 5, and the left transverse reinforcing beam 6 are all provided with glue-applying grooves 11. The glue-applying grooves 11 are filled with two-component polyurethane structural adhesive, and then they are bonded to the top fairing body 1 by hydraulic jigs.

[0020] Specifically, the outer side of the adhesive application groove 11 is provided with an outer shielding rib 9 and the inner side is provided with an inner shielding rib 10. The outer shielding rib 9 and the inner shielding rib 10 are provided to ensure that the two-component polyurethane structural adhesive in the adhesive application groove 11 will not overflow and affect the appearance. The main reinforcing beam 2, the right transverse reinforcing beam 3, the right longitudinal reinforcing beam 4, the left longitudinal reinforcing beam 5 and the left transverse reinforcing beam 6 are all provided with reinforcing ribs 12 in the middle of their back sides to improve strength.

[0021] Specifically, the main reinforcing beam 2 has upward-facing second reinforcing flanges 21 on its upper and lower sides, which increases the strength of the main reinforcing beam 2.

[0022] Specifically, the materials of the top fairing body 1, main reinforcing beam 2, right transverse reinforcing beam 3, right longitudinal reinforcing beam 4, left longitudinal reinforcing beam 5, and left transverse reinforcing beam 6 are all PP+LF30. Moreover, the base wall thickness of the top fairing body 1 is 3mm, and the base wall thickness of the main reinforcing beam 2, right transverse reinforcing beam 3, right longitudinal reinforcing beam 4, left longitudinal reinforcing beam 5, and left transverse reinforcing beam 6 is 2.5mm. The walls are relatively thin and the weight is light.

[0023] like Figure 3 and 8 As shown, this utility model sets some parameters according to production needs, based on theoretical analysis and practical application experience data. Figure 3 In the diagram, 'a' represents the height of the second reinforcing flange 21, which is 20mm; 'b' represents the thickness of the second reinforcing flange 21, which is 2mm; 'c' represents the width of the outer shielding rib 9, which is 1mm; 'd' represents the thickness of the middle part of the main reinforcing beam 2, which is 2.5mm; 'e' represents the thickness of the wall of the main reinforcing beam 2 between the second reinforcing flange 21 and the middle part of the main reinforcing beam 2, which is 2.5mm; 'f' represents the wall thickness of the top shroud body 1, which is 3mm; 'g' represents the width of the adhesive coating groove 11, which is 15mm; 'h' represents the gap distance between the outer shielding rib 9 and the top shroud body 1, which is 0.5mm; and 'i' represents the height of the outer shielding rib 9, which is 0.5mm. Figure 8 In the figure, o is the overall height of the main reinforcing beam 2, o is 42mm, p is the height of the reinforcing rib 12, p is 10mm, q is the thickness of the reinforcing rib 12, q is 2mm, and r is the width of the middle part of the main reinforcing beam 2, r is 100mm.

[0024] The installation process of this utility model is as follows: Figure 9As shown, in step 1, the clamp nut 8 is assembled onto the right longitudinal reinforcing beam 4 and the left longitudinal reinforcing beam 5. The clamp nut 8 is used to connect the vehicle body. In step 2, one end of the right transverse reinforcing beam 3 is fixed to the middle of the right longitudinal reinforcing beam 4 with screws 7, and one end of the left transverse reinforcing beam 6 is fixed to the middle of the left longitudinal reinforcing beam 5 with screws 7. In step 3, the top ends of the right longitudinal reinforcing beam 4 and the left longitudinal reinforcing beam 5 are also fixed to the main reinforcing beam 2 with screws 7. In step 4, the main reinforcing beam 2, the right transverse reinforcing beam 3, the right longitudinal reinforcing beam 4, the left longitudinal reinforcing beam 5, and the left transverse reinforcing beam 6 are first connected. Place the top fairing body 1 on the lower mold of the bonding fixture, then place it on the upper mold of the bonding fixture. Then flame treat the glue application grooves 11 on the main reinforcing beam 2, the right transverse reinforcing beam 3, the right longitudinal reinforcing beam 4, the left longitudinal reinforcing beam 5, and the left transverse reinforcing beam 6 and the corresponding adhesive areas on the top fairing body 1 to ensure the adhesion of the glue. Finally, apply two-component polyurethane structural adhesive into the glue application grooves 11. Then, use the upper and lower molds of the bonding fixture to bond the main reinforcing beam 2, the right transverse reinforcing beam 3, the right longitudinal reinforcing beam 4, the left longitudinal reinforcing beam 5, and the left transverse reinforcing beam 6 to the top fairing body 1. This completes the installation.

[0025] This utility model has an attractive appearance, high overall strength, light weight, environmental friendliness, low cost, and high production efficiency, and is conducive to mass production, meeting customers' requirements for weight reduction, aesthetics, and strength.

[0026] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-layer injection-molded roof fairing structure, characterized in that, The system includes a top shroud body (1), a main reinforcing beam (2), a right-side transverse reinforcing beam (3), a right-side longitudinal reinforcing beam (4), a left-side longitudinal reinforcing beam (5), and a left-side transverse reinforcing beam (6). The right-side longitudinal reinforcing beam (4) and the left-side longitudinal reinforcing beam (5) are vertically fixed to the right and left sides of the surface of the top shroud body (1), respectively, and both the right-side longitudinal reinforcing beam (4) and the left-side longitudinal reinforcing beam (5) are located in the middle and bottom of the top shroud body (1). The right-side transverse reinforcing beam (3) and the left-side transverse reinforcing beam (6) are transversely fixed to the right and left sides of the surface of the top shroud body (1), respectively, with one end of the right-side transverse reinforcing beam (3) fixed to the middle of the right-side longitudinal reinforcing beam (4), and one end of the left-side transverse reinforcing beam (6) fixed to the middle of the left-side longitudinal reinforcing beam (5). The main reinforcing beam (2) is fixed laterally on the top surface of the top fairing body (1), and the top of the right longitudinal reinforcing beam (4) and the top of the left longitudinal reinforcing beam (5) are fixed to the main reinforcing beam (2). The roof fairing is symmetrical on the left and right and the left and right sides are turned up. The right side of the right transverse reinforcing beam (3) and the left side of the left transverse reinforcing beam (6) are respectively adapted to the right side and the left side of the top fairing body (1). The left side and the right side of the main reinforcing beam (2) are respectively adapted to the right side and the left side of the top fairing body (1). The outer periphery of the back of the main reinforcing beam (2), the right transverse reinforcing beam (3), the right longitudinal reinforcing beam (4), the left longitudinal reinforcing beam (5) and the left transverse reinforcing beam (6) are all provided with glue grooves (11).

2. The injection-molded double-layer bonded roof fairing structure according to claim 1, characterized in that, The glue-coating groove (11) is provided with an outer shielding rib (9) on the outside and an inner shielding rib (10) on the inside. The main reinforcing beam (2), the right transverse reinforcing beam (3), the right longitudinal reinforcing beam (4), the left longitudinal reinforcing beam (5) and the left transverse reinforcing beam (6) are all provided with reinforcing ribs (12) in the middle of their back sides.

3. The injection-molded double-layer bonded roof spoiler structure according to claim 2, characterized in that, The main reinforcing beam (2) has an upward-facing second reinforcing flange (21) on its upper and lower sides.

4. The injection-molded double-layer bonded roof spoiler structure according to claim 3, characterized in that, The materials of the top fairing body (1), main reinforcing beam (2), right transverse reinforcing beam (3), right longitudinal reinforcing beam (4), left longitudinal reinforcing beam (5) and left transverse reinforcing beam (6) are all PP+LF30.

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