Steel-aluminum composite floor structure of light truck

Abstract

The invention discloses a light truck steel-aluminum mixed floor structure, which belongs to the technical field of automobile accessories and comprises a floor framework assembly, and a front floor assembly and a middle floor assembly which are sequentially arranged from front to back are supported on the top surface of the floor framework assembly; the splicing position of the front floor assembly and the middle floor assembly, the splicing position of the front floor assembly and the floor framework assembly and the splicing position of the middle floor assembly and the floor framework assembly are filled with structural adhesives, and riveting points are arranged at the splicing positions at intervals. The splicing positions are filled with the structural adhesive in advance, the sealing performance is improved, meanwhile, the adjacent parts can be fixed in an adhesive mode, then the splicing positions are reinforced through the riveting points, and the splicing positions are prevented from being disengaged; especially, the lap joint of the steel and the aluminum is filled with the structural adhesive, electrochemical corrosion caused by electrochemical reaction due to different activities is avoided, and the overall firmness can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile accessories, in particular to a light card steel-aluminum hybrid floor structure. Background Art

[0002] With the rise of the logistics industry, especially short-distance logistics within the city, light trucks have gradually become the main model for short-distance logistics. At the same time, with the improvement of living standards and the participation of young drivers, consumers have put forward higher requirements for the comfort, safety and lightweight of light trucks.

[0003] The floor structure of the cab of a light truck is the basic component of the vehicle cab. It carries the weight of the driver, passengers and cargo, and needs to withstand the impact of the vehicle during driving. The design must take into account comfort, safety and durability, and mainly includes floor panels, reinforcements, suspension systems, carpets and sound insulation materials, as well as seat support structures. The floor structure must have sufficient load-bearing capacity, cushioning performance, rigidity and strength, and be easy to install and maintain.

[0004] However, in the current light truck market, the cab floors are mostly made of steel structures due to factors such as strength, safety, cost, and craftsmanship. This restricts the further lightweighting of light truck cabs and further affects the cargo capacity of light trucks.

[0005] For light trucks, which are positioned as production tools and money-making tools, if the cab is completely replaced with aluminum alloy, although the weight can be greatly reduced, it will inevitably increase the production cost of light trucks, which will eventually be passed on to consumers. Under the constraints of certain lightweight and cost targets, the steel-aluminum hybrid solution is the only way for light truck cabs. Due to the large differences in thermal conductivity, electrical conductivity and thermal expansion between aluminum alloy and steel, and the brittle intermetallic compound layer generated at the interface of the resistance spot welding joint, it is difficult to form a good weld. Therefore, conventional resistance spot welding is difficult to achieve steel-aluminum connection. How to achieve steel-aluminum hybrid connection is a technical problem that needs to be solved. Summary of the invention

[0006] In order to solve the problem of unreliable steel-aluminum connection when using a steel-aluminum hybrid structure to optimize the performance of the cab floor assembly, the present invention provides a steel-aluminum hybrid floor structure for a light truck.

[0007] The present invention is achieved through the following technical solutions: A light card steel-aluminum hybrid floor structure includes a floor frame assembly, the top surface of the floor frame assembly supports a front floor assembly and a middle floor assembly arranged in sequence from front to rear; the joints between the front floor assembly and the middle floor assembly, the joints between the front floor assembly and the floor frame assembly, and the joints between the middle floor assembly and the floor frame assembly are all filled with structural adhesive, and riveting points are provided at intervals at the above joints.

[0008] By pre-filling the joints with structural adhesive, the sealing is improved while the adjacent parts can be adhesively fixed, and the joints are reinforced through riveting points to prevent the joints from coming apart. In particular, the steel and aluminum overlap joints are filled with structural adhesive to avoid electrochemical corrosion caused by electrochemical reactions due to different activities, which helps to improve the overall firmness.

[0009] A further improvement of the present invention is that the front floor assembly includes a front floor, and a front floor left reinforcing plate and a front floor right reinforcing plate are provided on the front side of the front floor; the front floor is made of aluminum, and the front floor left reinforcing plate and the front floor right reinforcing plate are made of steel; the front floor is overlapped near the edge of the front floor left reinforcing plate and the front floor right reinforcing plate, and structural adhesive is filled between the aluminum material and the steel material, and riveting points are arranged at intervals. The front floor is the installation base of the front floor assembly, and the front floor left reinforcing plate and the front floor right reinforcing plate help to enhance the reinforcing effect of the front floor assembly to prevent the fatigue of the front floor from being damaged.

[0010] A further improvement of the present invention is that a left step reinforcement plate and a right step reinforcement plate are respectively provided on both sides of the front floor. The left step reinforcement plate and the right step reinforcement plate help to improve the structural strength of the entire front floor assembly, provide support and reinforcement for the steps, and avoid shaking under force.

[0011] A further improvement of the present invention is that a left threshold assembly and a right threshold assembly are welded to the front floor behind the left step reinforcement plate and the right step reinforcement plate. The left threshold assembly and the right threshold assembly can improve the structural strength of the front floor assembly and provide reliable installation for external decorative accessories.

[0012] The present invention is further improved in that the middle floor assembly is composed of a middle floor, and the middle floor is connected with a sub-instrument panel mounting bracket assembly, a main seat mounting bracket, a shift mechanism mounting bracket and a sub-seat mounting bracket; the middle floor is made of aluminum, and the sub-instrument panel mounting bracket assembly, the main seat mounting bracket, the shift mechanism mounting bracket and the sub-seat mounting bracket are all made of steel; the aluminum material and the steel material are filled with structural adhesive, and riveting points are arranged at intervals. The middle floor is the mounting base of the middle floor assembly, the sub-instrument panel mounting bracket assembly can provide reliable installation for the sub-instrument panel, the main seat mounting bracket can provide reliable installation for the main seat, the shift mechanism mounting bracket can provide reliable installation for the shift operating mechanism, and the sub-seat mounting bracket can provide reliable installation for the sub-seat and the middle seat.

[0013] A further improvement of the present invention is that the above-mentioned main seat mounting bracket includes a main seat left front mounting bracket, a main seat right front mounting bracket and a main seat right rear mounting bracket.

[0014] A further improvement of the present invention is that the floor frame assembly includes a floor front cross beam assembly, a floor left longitudinal beam assembly, a floor right longitudinal beam assembly and a floor rear cross beam assembly, wherein the floor front cross beam assembly, the floor left longitudinal beam assembly, the floor rear cross beam assembly and the floor right longitudinal beam assembly are made of steel and are connected end to end in sequence to form a frame structure that can support the front floor assembly and the middle floor assembly, which helps to form a stronger frame support structure.

[0015] A further improvement of the present invention is that the above-mentioned left longitudinal beam assembly and the right longitudinal beam assembly of the floor are symmetrical structures with the same structure; and the left longitudinal beam assembly includes a longitudinal beam front joint, a longitudinal beam sub-assembly, a longitudinal beam rear joint, a front fender assembly and a rear fender assembly welded in sequence from front to rear; the longitudinal beam sub-assembly includes a longitudinal beam body and a longitudinal beam lining arranged thereon; the longitudinal beam body and the longitudinal beam lining are double-layer cavity structures. This helps to improve the structural strength of the two longitudinal beam assemblies and achieve load dispersion.

[0016] A further improvement of the present invention is that the left longitudinal beam assembly is made of hot-formed steel.

[0017] A further improvement of the present invention is that a left floor baffle assembly and a right floor baffle assembly are respectively provided at both ends of the above-mentioned floor rear cross beam assembly.

[0018] It can be seen from the above technical scheme that the beneficial effects of the present invention are: by pre-filling the joints with structural adhesive, the adjacent components can be adhesively fixed while improving the sealing, and then the joints are reinforced by riveting points to prevent the joints from coming apart; especially the steel and aluminum overlap joints are filled with structural adhesive to avoid electrochemical corrosion caused by electrochemical reactions due to different activities, which helps to improve the overall firmness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a light truck floor structure according to a specific embodiment of the present invention; Figure 2 It is a structural schematic diagram of a front floor assembly according to a specific embodiment of the present invention; Figure 3 It is a structural schematic diagram of a middle floor assembly according to a specific embodiment of the invention; Figure 4 It is a structural schematic diagram of a floor frame assembly according to a specific embodiment of the invention; Figure 5It is a schematic structural diagram of a floor longitudinal beam assembly according to a specific embodiment of the invention.

[0021] In the attached figure: 100, front floor assembly, 200, middle floor assembly, 300, floor frame assembly, 101, front floor, 103, front floor left reinforcement plate, 105, front floor right reinforcement plate, 107, left step reinforcement plate, 109, right step reinforcement plate, 111, left door sill assembly, 113, right door sill assembly, 201, middle floor, 203, auxiliary instrument panel mounting bracket assembly, 205, main seat left front mounting bracket, 207, main seat right front mounting bracket, 209, main seat right rear mounting bracket, 211, shift mechanism mounting bracket, 213, auxiliary seat mounting bracket, 301, floor front crossbeam assembly, 303, floor left longitudinal beam assembly, 305, floor right longitudinal beam assembly, 307, floor rear crossbeam assembly, 309, left floor baffle assembly, 311, right floor baffle assembly, 1. Longitudinal beam front joint, 3. Longitudinal beam sub-assembly, 5. Longitudinal beam rear joint, 7. Front fender assembly, 9. Rear fender assembly, 3-1. Longitudinal beam body, 3-2. Longitudinal beam lining. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0023] like Figure 1-5 As shown, the present invention discloses a light truck steel-aluminum hybrid floor structure, including a floor frame assembly 300; the floor frame assembly 300 includes a floor front beam assembly 301, a floor left longitudinal beam assembly 303, a floor right longitudinal beam assembly 305 and a floor rear beam assembly 307. The floor front beam assembly 301, the floor left longitudinal beam assembly 303, the floor rear beam assembly 307 and the floor right longitudinal beam assembly 305 are made of steel and are connected end to end in sequence to form a frame structure that can support the front floor assembly 100 and the middle floor assembly 200. It is helpful to form a stronger frame support structure.

[0024] The left longitudinal beam assembly 303 and the right longitudinal beam assembly 305 of the floor are symmetrical structures with the same structure; the left longitudinal beam assembly includes a longitudinal beam front joint 1, a longitudinal beam sub-assembly 3, a longitudinal beam rear joint 5, a front fender assembly 7 and a rear fender assembly 9 welded in sequence from front to back; the longitudinal beam sub-assembly 3 includes a longitudinal beam body 3-1 and a longitudinal beam lining 3-2 arranged thereon; the longitudinal beam body 3-1 and the longitudinal beam lining 3-2 are double-layer cavity structures; the left longitudinal beam assembly is hot-formed steel. This helps to improve the structural strength of the two longitudinal beam assemblies and achieve load dispersion.

[0025] The two ends of the floor rear cross beam assembly 307 are respectively provided with a left floor baffle assembly 309 and a right floor baffle assembly 311 .

[0026] The top surface of the floor frame assembly 300 supports the front floor assembly 100 and the middle floor assembly 200 arranged in sequence from front to back; the joints between the front floor assembly 100 and the middle floor assembly 200, the joints between the front floor assembly 100 and the floor frame assembly 300, and the joints between the middle floor assembly 200 and the floor frame assembly 300 are all filled with structural adhesive, and riveting points are arranged at intervals at the above joints. By pre-filling the joints with structural adhesive, the sealing performance is improved while the adjacent components can be glued and fixed, and the joints are reinforced by riveting points to prevent the joints from coming apart.

[0027] The front floor assembly 100 includes a front floor 101, and a front floor left reinforcing plate 103 and a front floor right reinforcing plate 105 are arranged on the front side of the front floor 101; the front floor 101 is made of aluminum, and the front floor left reinforcing plate 103 and the front floor right reinforcing plate 105 are made of steel; the front floor 101 is overlapped near the edges of the front floor left reinforcing plate 103 and the front floor right reinforcing plate 105, and structural adhesive is filled between the aluminum material and the steel material, and riveting points are arranged at intervals. The front floor 101 is the installation base of the front floor assembly 100, and the front floor left reinforcing plate 103 and the front floor right reinforcing plate 105 help to enhance the reinforcing effect of the front floor assembly 100 to prevent the fatigue damage of the front floor 101; in particular, the filling of structural adhesive at the steel-aluminum overlap avoids electrochemical corrosion caused by electrochemical reaction due to different activities, which helps to enhance the overall firmness.

[0028] The left step reinforcement plate 107 and the right step reinforcement plate 109 are respectively provided on both sides of the front floor 101. The left step reinforcement plate 107 and the right step reinforcement plate 109 help to improve the structural strength of the entire front floor assembly 100, provide support and reinforcement for the steps, and avoid shaking under force.

[0029] A left sill assembly 111 and a right sill assembly 113 are welded to the front floor 101 behind the left step reinforcement plate 107 and the right step reinforcement plate 109. The left sill assembly 111 and the right sill assembly 113 can improve the structural strength of the front floor assembly 100 and provide reliable installation for external decorative accessories.

[0030] The middle floor assembly 200 is composed of a middle floor 201, to which a sub-instrument panel mounting bracket assembly 203, a main seat mounting bracket, a shift mechanism mounting bracket 211 and a sub-seat mounting bracket 213 are connected; the middle floor 201 is made of aluminum, and the sub-instrument panel mounting bracket assembly 203, the main seat mounting bracket, the shift mechanism mounting bracket 211 and the sub-seat mounting bracket 213 are all made of steel; structural adhesive is filled between the aluminum and steel materials, and riveting points are arranged at intervals. The middle floor 201 is the mounting base of the middle floor 201 assembly 200, the sub-instrument panel mounting bracket assembly 203 can provide reliable installation for the sub-instrument panel, the main seat mounting bracket can provide reliable installation for the main seat, the shift mechanism mounting bracket 211 can provide reliable installation for the shift operating mechanism, and the sub-seat mounting bracket 213 can provide reliable installation for the sub-seat and the middle seat.

[0031] The main seat mounting bracket includes a main seat left front mounting bracket 205 , a main seat right front mounting bracket 207 and a main seat right rear mounting bracket 209 .

[0032] The middle floor 201 and the front floor 101 are both made of 6 series aluminum.

[0033] The light steel-aluminum hybrid floor structure described in the present invention is pre-filled with structural adhesive at the joints, so that adjacent parts can be adhesively fixed while improving the sealing, and the joints are reinforced by riveting points to prevent the joints from detaching. In particular, the steel and aluminum overlap joints are filled with structural adhesive to avoid electrochemical corrosion caused by electrochemical reactions due to different activities, which helps to improve the overall firmness.

[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A light steel-aluminum hybrid floor structure, comprising a floor frame assembly (300), characterized in that: The top surface of the floor frame assembly (300) supports a front floor assembly (100) and a middle floor assembly (200) which are arranged in sequence from front to back; the joints between the front floor assembly (100) and the middle floor assembly (200), the joints between the front floor assembly (100) and the floor frame assembly (300), and the joints between the middle floor assembly (200) and the floor frame assembly (300) are all filled with structural adhesive, and riveting points are provided at intervals at the joints.

2. The light steel-aluminum hybrid floor structure according to claim 1 is characterized in that: The front floor assembly (100) comprises a front floor (101), and a front floor left reinforcement plate (103) and a front floor right reinforcement plate (105) are provided on the front side of the front floor (101); the front floor (101) is made of aluminum, and the front floor left reinforcement plate (103) and the front floor right reinforcement plate (105) are made of steel; the front floor (101) is arranged in an overlapping manner near the edges of the front floor left reinforcement plate (103) and the front floor right reinforcement plate (105), and structural adhesive is filled between the aluminum material and the steel material, and riveting points are arranged at intervals.

3. The light steel-aluminum hybrid floor structure according to claim 2 is characterized in that: A left step reinforcement plate (107) and a right step reinforcement plate (109) are respectively provided on both sides of the front floor (101).

4. The light steel-aluminum hybrid floor structure according to claim 3 is characterized in that: A left door sill assembly (111) and a right door sill assembly (113) are welded to the front floor (101) at the rear sides of the left step reinforcement plate (107) and the right step reinforcement plate (109).

5. The light steel-aluminum hybrid floor structure according to claim 1 is characterized in that: The middle floor assembly (200) comprises a middle floor (201), to which a secondary instrument panel mounting bracket assembly (203), a main seat mounting bracket, a shift mechanism mounting bracket (211), and a secondary seat mounting bracket (213) are connected; the middle floor (201) is made of aluminum, and the secondary instrument panel mounting bracket assembly (203), the main seat mounting bracket, the shift mechanism mounting bracket (211), and the secondary seat mounting bracket (213) are all made of steel; structural adhesive is filled between the aluminum material and the steel material, and riveting points are arranged at intervals.

6. The light steel-aluminum hybrid floor structure according to claim 5 is characterized in that: The main seat mounting bracket comprises a main seat left front mounting bracket (205), a main seat right front mounting bracket (207) and a main seat right rear mounting bracket (209).

7. A light steel-aluminum hybrid floor structure according to any one of claims 1 to 6, characterized in that: The floor frame assembly (300) comprises a floor front crossbeam assembly (301), a floor left longitudinal beam assembly (303), a floor right longitudinal beam assembly (305) and a floor rear crossbeam assembly (307); the floor front crossbeam assembly (301), the floor left longitudinal beam assembly (303), the floor rear crossbeam assembly (307) and the floor right longitudinal beam assembly (305) are made of steel and are connected end to end in sequence to form a frame structure capable of supporting the front floor assembly (100) and the middle floor assembly (200).

8. The light steel-aluminum hybrid floor structure according to claim 7 is characterized in that: The left longitudinal beam assembly (303) and the right longitudinal beam assembly (305) of the floor are symmetrical structures with the same structure; the left longitudinal beam assembly comprises a longitudinal beam front joint (1), a longitudinal beam sub-assembly (3), a longitudinal beam rear joint (5), a front fender assembly (7) and a rear fender assembly (9) which are welded in sequence from front to back; the longitudinal beam sub-assembly (3) comprises a longitudinal beam body (3-1) and a longitudinal beam lining (3-2) arranged thereon; the longitudinal beam body (3-1) and the longitudinal beam lining (3-2) are double-layer cavity structures.

9. The light steel-aluminum hybrid floor structure according to claim 8 is characterized in that: The left longitudinal beam assembly is made of hot-formed steel.

10. The light steel-aluminum hybrid floor structure according to claim 8, characterized in that: A left floor baffle assembly (309) and a right floor baffle assembly (311) are respectively provided at both ends of the floor rear crossbeam assembly (307).

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