Automobile fuel tank strap mounting bracket structure

Abstract

The present invention aims to provide a high-strength and high-rigidity mounting bracket structure for an automotive fuel tank strap, comprising a mounting bracket body in the form of an upwardly opening U-shaped groove. Bolts for mounting the strap are fixed to the bottom plate of the U-shaped groove. The upper plate edge of the U-shaped groove is bent to form flanges on both sides. The front section of the flange is welded to the lower plate surface of the rear floor, and the rear section of the flange is welded to the lower plate surface of the welded edge of the rear floor crossbeam. In the above scheme, the reinforcing bracket body is welded to both the rear floor and the rear floor crossbeam, forming a clear and effective force transmission path between the three, ensuring smooth force transmission, preventing local stress concentration, and effectively absorbing energy. The entire transmission path forms a complete frame structure. The inherent structure of the mounting bracket body and the force transmission path further enhance the strength and rigidity of the mounting bracket body, ensuring that the strap can reliably secure and protect the fuel tank, thereby ensuring the safety of the entire vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to an automobile fuel tank strap mounting bracket structure. Background Art

[0002] A car fuel tank is a fuel storage container for a car's fuel power system. Existing car fuel tanks are generally installed below the rear of the car floor. The fuel tank is first fixed by a fuel tank mounting bracket located on the underside of the floor, and then tightened by a fuel tank strap to prevent it from shaking.

[0003] In the prior art, the ends of a fuel tank strap are typically secured directly to the vehicle floor. For example, the utility model patents entitled "A Connection Structure of a Fuel Tank Strap and a Vehicle Floor" (Granted Publication No. CN207683326U) and "A Fuel Tank Strap, Fuel Tank Fixing Structure, and Vehicle" (Granted Publication No. CN213565423U) both employ a method of threading bolts through holes at both ends of the strap and through the vehicle floor before being secured with fixing nuts. However, a vehicle fuel tank is large and heavy when loaded with fuel. During driving, the fuel tank is also affected by inertia, exerting a significant pulling force on the vehicle floor at both ends of the fuel tank strap, causing deformation and cracking of the floor. In severe cases, the fuel tank may fall off during driving, resulting in casualties and property damage.

[0004] Purpose of the Invention

[0005] The object of the present invention is to provide a vehicle fuel tank strap mounting bracket structure with high strength and rigidity.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a car fuel tank strap mounting bracket structure, including a mounting bracket body in the shape of a U-shaped groove with an opening upward, bolts for mounting the strap are fixed on the bottom plate of the U-shaped groove, and flanges are bent to both sides at the upper plate edge of the groove wall of the U-shaped groove, the front section of the flange is adhered and welded to the lower plate surface of the rear floor, and the rear section of the flange is adhered and welded to the lower plate surface of the welding edge of the rear floor cross beam.

[0007] In the above solution, the reinforcement bracket body is welded and fixed to the rear floor and the rear floor crossbeam at the same time, forming a clear and effective force transmission path between the three, ensuring smooth transmission of force, preventing local stress concentration, and effectively absorbing energy. The entire transmission path constitutes a complete frame structure. The structure of the mounting bracket body itself and the force transmission path further improve the strength and rigidity of the mounting bracket body itself, ensuring that the straps can reliably fix and protect the fuel tank and ensure the safety of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the overall structure of the present invention when viewed from bottom to top;

[0009] Figure 2 is a three-dimensional diagram of the mounting bracket body;

[0010] Figure 3 for Figure 2 Exploded diagram of . DETAILED DESCRIPTION

[0011] For ease of understanding, the following is an explanation of the use environment of the present invention. Since the fuel tank is installed below the rear floor 30, the mounting bracket body 10 is also fixed to the lower plate surface of the rear floor 30. Looking up from below the rear floor 30 (i.e., looking up), the mounting bracket body 10 can be seen. The direction toward the front of the vehicle is defined as "front", and the direction toward the rear of the vehicle is defined as "rear". Figure 1-Figure 3 The present invention is described in further detail.

[0012] A mounting bracket structure for an automotive fuel tank strap includes a mounting bracket body 10 in the form of an upwardly opening U-shaped groove. Bolts 21 for mounting the strap are fixed to the bottom plate 11 of the U-shaped groove. Flanges 13 are bent toward both sides of the upper plate edge of the U-shaped groove wall 12. The front section 13a of the flange 13 is welded to the lower surface of the rear floor 30, and the rear section 13b of the flange 13 is welded to the lower surface of the welding edge 41 of the rear floor cross member 40. The reinforcing bracket body 10 is welded to both the rear floor 30 and the rear floor cross member 40, forming a clear and effective force transmission path between the three, ensuring smooth force transmission, preventing localized stress concentration, and effectively absorbing energy. The entire transmission path forms a complete framework structure. The inherent structure of the mounting bracket body 10 and the force transmission path further enhance its strength and rigidity, ensuring that the strap can reliably secure and protect the fuel tank, thereby ensuring overall vehicle safety.

[0013] The mounting bracket body 10 only relies on the rear section 13b of the flange 13 to fit and weld with the lower plate surface of the welding edge 31 of the rear floor cross beam 40, and its connection strength is far from enough. The rear floor cross beam 40 is a groove with the groove facing upward and the groove length arranged along the width direction of the vehicle. The groove wall 12 extends rearward with an extension plate 14, and the rear end of the extension plate 14 is flipped to both sides with a flap 15, which is affixed to and welded to the lower plate surface of the main body 42 of the rear floor cross beam 40. The rear end of the flange 13 and the front end of the flap 15 are transitionally connected by an inclined plate 16, and the inclined plate 16 is fit and welded to the lower plate surface of the transition plate 43 between the main body 42 and the welding edge 41 of the rear floor cross beam 40. The extension plate 14, inclined plate 16 and flap 15 extend from the groove wall of the rear floor cross beam 40 from top to bottom to the lower plate surface of the groove bottom. That is, the directions of the extension plate 14 , the flap 15 and the inclined plate 16 are determined according to the contour of the lower plate surface of the rear floor beam 40 , thereby increasing the welding area and ensuring the welding strength between the rear floor beam 40 and the mounting bracket body 10 .

[0014] Preferably, the trough bottom plate 11 is a two-piece structure formed by folding the lower plate edge of the trough wall 12 toward the middle, which greatly reduces the difficulty of stamping. A gap is left between the two trough bottom plates 11 and through holes 111 for the bolts 21 to pass through are provided at the opposite edges of the two trough bottom plates 11 for the installation of the bolts 21.

[0015] In order to further increase the connection strength between the mounting bracket body 10 and the rear floor 30, a front side wall 17 is provided at the front end notch of the mounting bracket body 10. The front side wall 17 and the groove wall 12 are integrally stamped and formed, and a welding plate 18 is provided on the upper plate edge of the front side wall 17 facing the front side. The welding plate 18 is adhered to and welded to the lower plate surface of the rear floor 30 to increase the welding area and ensure the connection strength.

[0016] like Figure 3 As shown, bolts 21 are fixed to bolt fixing plate 22. Bolt fixing plate 22 is generally folded and comprises a flat plate 221 and a vertical plate 222 bent upward at the front end of flat plate 221. Bolts 21 are fixed to flat plate 221, passing through through-holes 111. The lower surface of flat plate 221 is bonded and welded to the upper surface of the tank bottom plate 11. Vertical plate 222 is bonded and welded to the front side wall 17. This not only improves the connection strength between bolts 21 and tank bottom plate 11, but also reduces the difficulty of stamping the mounting bracket body 10. Bolt fixing plate 22 has a simple structure and is highly versatile, making it suitable for installation and use in other areas of the vehicle body.

[0017] Because the rear floor panel 30 and rear floor cross member 40 are overlap-welded at their junction, there is a height difference between the two panels at this location. Therefore, the front section of the flange 13 welded to the rear floor panel 30 is higher than the rear section of the flange 13 welded to the rear floor cross member 40. This ensures that the front section 13a and the rear section 13b can be simultaneously bonded to and welded to the surfaces of the rear floor panel 30 and the rear floor cross member 40. Furthermore, a reinforcing rib is formed at the junction of the front section 13a and the rear section 13b, further increasing the strength of the flange 13.

[0018] A reinforcing rib structure a is provided at the junction of the front side wall 17 and the welding plate 18 to improve the structural rigidity and strength of the mounting bracket body 10 .

[0019] A missing portion 19 is provided between the front side wall 17 and the bottom plate 11 , and a plate body between the flat plate 221 and the vertical plate 222 is placed in the missing portion 19 .

[0020] Since both ends of the fuel tank strap need to be fixed to the vehicle body, the mounting bracket body 10 is provided with two groups of fixing the two ends of the fuel tank strap at intervals in the vehicle width direction to ensure the strength of the mounting point.

Claims

1. A mounting bracket structure for a fuel tank strap of an automobile, characterized by: The mounting bracket body (10) is formed into a U-shaped groove with an opening facing upward. Bolts (21) for mounting a strap are fixed to the bottom plate (11) of the U-shaped groove. The upper plate edge of the groove wall (12) of the U-shaped groove is bent to both sides to form flanges (13). The front section (13a) of the flange (13) is bonded and welded to the lower plate surface of the rear floor (30). The rear section (13b) of the flange (13) is bonded and welded to the lower plate surface of the welding edge (41) of the rear floor cross beam (40). The groove bottom plate (11) is a two-piece structure formed by folding the lower plate edge of the groove wall (12) toward the middle, with a gap left between the two groove bottom plates (11) and through holes (111) for the bolts (21) to pass through provided at the opposite sides of the two groove bottom plates (11); A front side wall (17) is provided at the front notch of the mounting bracket body (10), the front side wall (17) and the groove wall (12) are integrally stamped, and a welding plate (18) is provided on the upper plate edge of the front side wall (17) facing forward, and the welding plate (18) is attached and welded to the lower plate surface of the rear floor (30); The bolt (21) is fixed on the bolt fixing plate (22). The bolt fixing plate (22) is in the shape of a folded plate as a whole, including a flat plate (221) and a vertical plate (222) bent upward at the front end of the flat plate (221). The bolt (21) is fixed on the flat plate (221). The bolt (21) passes through the through hole (111) and the lower plate surface of the flat plate (221) is bonded and welded to the upper plate surface of the groove bottom plate (11). The vertical plate (222) is bonded and welded to the front side wall (17).

2. The automobile fuel tank strap mounting bracket structure according to claim 1, characterized in that: The rear floor cross member (40) is in the shape of a groove with the groove opening facing upward and the groove length arranged along the vehicle width direction. An extension plate (14) is extended rearward from the groove wall (12). The rear end of the extension plate (14) is turned over to both sides with a flap (15). The flap (15) is abutted against and welded to the lower plate surface of the main body (42) of the rear floor cross member (40). The rear end of the flange (13) and the front end of the flap (15) are transitionally connected via an inclined plate (16). The inclined plate (16) is abutted against and welded to the lower plate surface of the transition plate (43) between the main body (42) and the welding edge (41) of the rear floor cross member (40). The extension plate (14), the inclined plate (16) and the flap (15) extend from the groove wall portion of the rear floor cross member (40) from top to bottom to the lower plate surface of the groove bottom.

3. The automobile fuel tank strap mounting bracket structure according to claim 1, characterized in that: The height of the front section of the flange (13) welded to the rear floor (30) is higher than the height of the rear section of the flange (13) welded to the rear floor crossbeam (40).

4. The automobile fuel tank strap mounting bracket structure according to claim 1, characterized in that: A reinforcing rib structure (a) is provided at the junction of the front side wall (17) and the welding plate (18).

5. The automobile fuel tank strap mounting bracket structure according to claim 1, characterized in that: A missing portion (19) is provided between the front side wall (17) and the groove bottom plate (11), and a plate body between the flat plate (221) and the vertical plate (222) is placed in the missing portion (19).

6. The automobile fuel tank strap mounting bracket structure according to claim 1, characterized in that: Two groups of mounting bracket bodies (10) are arranged at intervals in the vehicle width direction.

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