A rear floor assembly

Abstract

The present invention relates to a rear floor assembly, which includes a rear floor. Longitudinal beams are provided on both sides of the rear floor. A front cross beam and a rear cross beam are arranged at intervals between the longitudinal beams. A suspension mounting plate is further provided on the rear floor. Two ends of the suspension mounting plate are respectively fixedly connected to the front cross beam and the rear cross beam. The front cross beam, the rear cross beam, the longitudinal beams, and the suspension mounting plate are combined to form a frame structure. The rear floor is used for fixing a suspension link system. The longitudinal beams are used for installing elastic elements, shock absorbers, and brake assemblies. One end of a control arm of the suspension link system is hinged to the suspension mounting plate, and the other end is hinged to the brake assembly. In the present invention, a frame structure composed of longitudinal beams, a front cross beam, a rear cross beam, and a suspension mounting plate is provided on the rear floor. On the premise of canceling the subframe, while ensuring sufficient rigidity, the weight of the vehicle is reduced, the lightweight of the vehicle is realized, and the vehicle manufacturing cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly to the technical field of chassis structures. Background Art

[0002] As Figure 1 and 2 shown, restricted by the process of stamping traditional sheet metal parts, the traditional independent rear suspension has dual limitations of insufficient body stiffness and insufficient installation point accuracy. A subframe needs to be designed in the overall structure of the independent rear suspension to solve the above two problems. That is, as Figure 1 and 2 shown, a suspension link system 4, an air spring 5, a shock absorber 6, and a brake assembly 7 are installed on a subframe 3 of the prior art. The subframe 3 is then connected to the vehicle body 2.

[0003] Therefore, the chassis structure is complex, resulting in a complex chassis system, a large structural weight, imposing pressure on the overall vehicle cost, and being unfavorable for the lightweight of the vehicle. Summary of the Invention

[0004] The purpose of the present invention is to provide a rear floor assembly to solve the problem that the existing automobile chassis structure with a subframe leads to a relatively high overall vehicle cost and is unfavorable for the lightweight of the vehicle.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A rear floor assembly includes a rear floor. Longitudinal beams are arranged on both sides of the rear floor. A front cross beam and a rear cross beam are arranged at intervals between the longitudinal beams. A suspension mounting plate is further arranged on the rear floor. Two ends of the suspension mounting plate are respectively fixedly connected to the front cross beam and the rear cross beam. The front cross beam, the rear cross beam, the longitudinal beams, and the suspension mounting plate form a frame structure. The rear floor is used to fix a suspension link system. The longitudinal beams are used to install elastic elements, shock absorbers, and brake assemblies. One end of a control arm of the suspension link system is hinged to the suspension mounting plate, and the other end is hinged to the brake assembly.

[0007] According to the above technical means, since longitudinal beams, a front cross beam, a rear cross beam, and a suspension mounting plate are arranged on the rear floor, the rear floor and the four of them form a frame structure with good strength. Installation points for elastic elements, shock absorbers, and brake assemblies are arranged on the longitudinal beams, and installation points for control arms are arranged on the suspension mounting plate. Each component is arranged on the above frame;

[0008] At the same time, since the suspension mounting plate is used to hinge the control arm, the suspension link system can be directly arranged on the rear floor and the frame structure. Thus, it is possible to ensure the stability of each component even without a subframe, which is beneficial to the lightweight of the vehicle and reduces the overall vehicle cost.

[0009] Further, the combination of the rear floor, longitudinal beam, front cross member, rear cross member, and suspension mounting plate is integrally die-cast from cast aluminum.

[0010] According to the above technical means, through the method of integral die-casting, the stiffness of the entire vehicle body structure is significantly improved compared to the vehicle body made of traditional sheet metal parts. At the same time, the use of aluminum material also realizes the lightweight of the vehicle.

[0011] Further, the number of the suspension mounting plates is 2, and they are axisymmetric with respect to the perpendicular bisector direction of the axis of the front cross member.

[0012] Further, an elastic element is provided on the longitudinal beam. One end of the elastic element is connected to the longitudinal beam, and the other end is connected to the control arm.

[0013] Further, one end of the shock absorber is connected to the longitudinal beam, and the other end is connected to the brake assembly.

[0014] Further, a stabilizer bar is provided between the two longitudinal beams. Both ends of the stabilizer bar are respectively connected to the control arms corresponding to each longitudinal beam.

[0015] Further, exhaust ribs are provided on the rear floor in a crisscross pattern.

[0016] Further, the suspension mounting plate is provided with weight-reducing holes.

[0017] Further, the front cross member, rear cross member, and longitudinal beam are all provided with reinforcing ribs.

[0018] Further, the elastic element is an air spring.

[0019] Advantages of the present invention:

[0020] In the present invention, a frame structure composed of a longitudinal beam, a front cross member, a rear cross member, and a suspension mounting plate is provided on the rear floor. On the premise of canceling the subframe and ensuring sufficient stiffness, the weight of the vehicle is reduced, the lightweight of the vehicle is realized, and the vehicle manufacturing cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the connection relationship between the vehicle body of the prior art and the subframe;

[0022] Figure 2 It is a schematic structural diagram of the connection relationship between the vehicle body of the prior art and the subframe;

[0023] Figure 3 It is a schematic diagram of the rear floor structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the present invention;

[0025] Figure 5 is Figure 4 exploded view;

[0026] Figure 6 is a schematic diagram of the component connection relationship of the present invention.

[0027] Among them, 1 - rear floor; 2 - vehicle body; 3 - subframe; 4 - suspension link system; 5 - air spring, 6 - shock absorber, 7 - brake assembly, 8 - anti-roll bar; 9 - suspension mounting plate; 10 - longitudinal beam; 11 - front cross beam; 12 - rear cross beam. Specific embodiments

[0028] The following will illustrate the implementation manners of the technical solutions of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the protection scope of the present invention.

[0029] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0030] This embodiment proposes a rear floor assembly, as Figure 3 shown, including a rear floor 1. Longitudinal beams 10 are provided on both sides of the rear floor. Front cross beam 11 and rear cross beam 12 are respectively provided at the front and rear ends of the rear floor 1. Both ends of the front cross beam 11 and the rear cross beam 12 are fixedly connected to the two longitudinal beams 10. Two suspension mounting plates 9 arranged at intervals are installed on the rear floor 1. Both ends of the suspension mounting plate 9 are fixedly connected to the front cross beam 11 and the rear cross beam 12 respectively. At the midline of the connection line of the two suspension mounting plates 9, the rear floor 1 is overall symmetric about the left and right.

[0031] The main stress-bearing structure of the rear floor 1 is the longitudinal beam 10. The mounting points of the air spring 5 and the shock absorber 6 are both set on the longitudinal beam 10. The mounting point of the control arm 41 of the suspension link system 4 is set on two suspension mounting plates 9. The two suspension mounting plates 9 are arranged longitudinally, lapping with the front cross beam 11 and the rear cross beam 12, and the bottom laps with the floor panel of the rear floor 1, forming a frame structure as a whole to ensure sufficient stiffness. To ensure light weight, a weight-reducing hole is provided on the suspension mounting plate 9, and this hole can also be used as a reserved clearance hole for the rear axle drive shaft. At the same time, the rear floor 1, the front cross beam 11, the rear cross beam 12, and the longitudinal beam 10 are combined and constructed by integral die-casting, ensuring the strength of the mounting points of each component.

[0032] As Figures 4 - 6 shown, the brake assembly 7 is fixed on the longitudinal beam 10, the suspension link system 4 is fixed on the rear floor 1, one end of the control arm 41 is hinged to the corresponding suspension mounting plate 9, and the other end is hinged to the brake assembly 7.

[0033] One end of the shock absorber 6 is fixed on the longitudinal beam 10, and the other end is fixed on the brake assembly 7.

[0034] One end of the air spring 5 is fixed on the longitudinal beam 10, and the other end is connected to the control arm 41.

[0035] A transverse stabilizer bar 8 is provided between the two longitudinal beams 10, and both ends of the transverse stabilizer bar 8 are respectively connected to the control arms 41 corresponding to each longitudinal beam 10.

[0036] In this embodiment, compared with the traditional sheet metal part vehicle body structure, the present invention cancels the subframe 3, greatly reducing the manufacturing process. The process adopts the high-pressure casting process, and the material is aluminum alloy. First, it is manufactured into a blank semi-finished product by die-casting equipment, and then the mounting surfaces and mounting holes are processed by mechanical machining.

[0037] In this embodiment, the main structure of the rear floor 1 is composed of two longitudinal beams 10, a front cross beam 11, a rear cross beam 12, and two suspension mounting plates 9 to form an integral structure. Among them, mounting seats for mounting corresponding components are designed on the suspension mounting plate 8, the longitudinal beam 10, and the rear floor 1. The coordinates of the mounting points are matched according to the hard points of the chassis suspension layout. Reinforcing ribs are designed on the side walls of the mounting seats to ensure the stiffness and strength of the mounting points.

[0038] In this embodiment, several reinforcing ribs are designed in the cavities of the longitudinal beam 10, the front cross beam 11, and the rear cross beam 12, arranged in a staggered manner. Exhaust ribs arranged in a staggered manner are designed on the thin-walled panel of the rear floor 1, which also plays a role in strengthening and ensures the realization of the casting process.

[0039] In this embodiment, to ensure the light weight of the rear floor 1 structure, weight-reducing holes are designed on both the suspension mounting plate 9 and the rear floor 1 panel.

[0040] In this embodiment, the subframe is cancelled, and the main structure is composed of components such as control arms 41, brake assemblies 7, shock absorbers 6, air springs 5, and anti-roll bars 8, which are connected into a whole by bolts. Compared with the traditional chassis independent suspension, the link systems in this embodiment are directly connected to the integrated die-cast rear floor 1 without a subframe 3 as a transition.

[0041] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are within the protection scope of the present invention.

Claims

1. A rear floor assembly, including a rear floor, Characterized in that: Longitudinal beams are arranged on both sides of the rear floor. Anterior cross beams and posterior cross beams are arranged at intervals between the longitudinal beams. A suspension mounting plate is also provided on the rear floor. Two ends of the suspension mounting plate are respectively fixedly connected to the anterior cross beam and the posterior cross beam. The anterior cross beam, the posterior cross beam, the longitudinal beams and the suspension mounting plate are combined to form a frame structure. The rear floor is used for fixing a suspension link system. The longitudinal beams are used for mounting elastic elements, shock absorbers and brake assemblies. One end of a control arm of the suspension link system is hinged to the suspension mounting plate, and the other end is hinged to the brake assembly; The combination of the rear floor, the longitudinal beams, the anterior cross beam, the posterior cross beam and the suspension mounting plate is integrally die-cast with cast aluminum; A weight-reducing hole is provided on the suspension mounting plate, and this weight-reducing hole also serves as a reserved clearance hole for the rear axle drive shaft to pass through; Mounting seats for mounting corresponding components are designed on the suspension mounting plate, the longitudinal beams and the rear floor, and the coordinates of the mounting points are matched according to the layout of the chassis suspension hard points.

2. The rear floor assembly according to claim 1, Characterized in that: The number of the suspension mounting plates is 2, and they are axisymmetric with respect to the perpendicular bisector direction of the axis of the anterior cross beam.

3. The rear floor assembly according to claim 1, Characterized in that: An elastic element is provided on the longitudinal beam. One end of the elastic element is connected to the longitudinal beam, and the other end is connected to the control arm.

4. The rear floor assembly according to claim 1, Characterized in that: One end of the shock absorber is connected to the longitudinal beam, and the other end is connected to the brake assembly.

5. The rear floor assembly according to claim 3, Characterized in that: A lateral stabilizer bar is provided between the two longitudinal beams. Two ends of the stabilizer bar are respectively connected to the control arms corresponding to each longitudinal beam.

6. The rear floor assembly according to claim 1, Characterized in that: Exhaust ribs are provided on the rear floor in a crisscross pattern.

7. The rear floor assembly according to claim 1, Characterized in that: Reinforcing ribs are provided on the anterior cross beam, the posterior cross beam and the longitudinal beams.

8. The rear floor assembly according to claim 3, Characterized in that: The elastic element is an air spring.

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