An adjustable steel-aluminum hybrid automobile rear floor assembly

Abstract

The present invention relates to an adjustable steel-aluminum hybrid automobile rear floor assembly, comprising a frame body, the frame body comprising a left longitudinal beam and a right longitudinal beam, a first crossbeam, a second crossbeam, and a third crossbeam connected between the left and right longitudinal beams by integral die-casting, and a plurality of rear suspension mounting points provided on the frame body; a rear floor front reinforcement beam and a rear floor front crossbeam are provided at the front end of the frame body, the two beams forming a cavity structure with the left longitudinal beam, the right longitudinal beam, and the first crossbeam; a rear floor front panel, a rear floor middle panel, and a rear floor rear panel are provided on the upper surface of the frame body from front to rear; a left beam front section and a right beam front section are connected to the outer sides of the front portions of the left and right longitudinal beams of the frame body, respectively; and a left rear bulge connector and a right rear bulge connector are connected to the middle portions of the left and right longitudinal beams of the frame body, respectively. The assembly has high integration and is easily controlled in precision, meeting the rigidity and strength requirements of the vehicle while reducing the number of components and weight.

Description

Technical Field

[0001] The invention relates to an automobile body, and in particular to an adjustable steel-aluminum hybrid automobile rear floor assembly. Background Art

[0002] The rear floor assembly is a critical component of a vehicle, impacting the vehicle's bending and torsional rigidity and crash performance. Conventional automotive rear floor assemblies have numerous parts, complex joints, and are difficult to precisely control. They also lack a significant weight advantage. For example, CN116039774A discloses a "rear floor assembly" comprising a rear floor with longitudinal beams disposed on either side, spaced between a front crossbeam and a rear crossbeam. The rear floor also includes a suspension mounting plate, each fixedly connected to the front and rear crossbeams. The front crossbeam, rear crossbeam, longitudinal beam, and suspension mounting plate form a frame structure. The rear floor secures the suspension linkage system, while the longitudinal beams mount elastic elements, shock absorbers, and brake assemblies. One end of the control arm of the suspension linkage system is hinged to the suspension mounting plate, and the other end is hinged to the brake assembly. Therefore, existing rear floor assemblies require improvement.

[0003] CN217969656U discloses a "rear floor assembly and vehicle." The rear floor assembly includes an integrally die-cast heel plate crossbeam, a rear floor front crossbeam, a rear floor rear crossbeam, a left rear wheelhouse, a right rear wheelhouse, a left rear longitudinal beam, a right rear longitudinal beam, and a floor panel. The heel plate crossbeam, the left rear longitudinal beam, the right rear longitudinal beam, and the rear floor front crossbeam form a frame structure that serves as a first mounting area. The floor panel, the rear floor front crossbeam, the left rear longitudinal beam, the right rear longitudinal beam, and the rear floor rear crossbeam form a second mounting area. This technical solution ensures superior lightweighting and collision safety.

[0004] CN110371199A discloses a "steel-aluminum hybrid automotive rear floor assembly and its connection technology," which includes a vehicle body rear floor. The assembly is characterized by being stamped from steel plate. The rear floor lower crossbeam, rear floor front crossbeam, rear floor front lower extension plate, rear floor rear lower extension plate, and rear section of the rear floor longitudinal beam connected to the vehicle body rear floor are stamped from high-strength steel. The rear floor longitudinal beam is integrally cast from an aluminum alloy. This steel-aluminum hybrid automotive rear floor assembly and its connection technology offer a simple structure, ease of connection, and excellent structural performance. It significantly reduces rear floor weight, lowers the overall vehicle lightweighting factor, and improves vehicle safety, offering promising application prospects.

[0005] Undoubtedly, the technical solutions disclosed in the above two patent documents are beneficial attempts in the relevant technical fields. Summary of the Invention

[0006] The purpose of the present invention is to provide an adjustable steel-aluminum hybrid automobile rear floor assembly with high integration and easy precision control. It can not only meet the rigidity and strength requirements of the automobile, but also reduce the number of components and reduce the weight of the rear floor assembly.

[0007] The adjustable steel-aluminum hybrid automobile rear floor assembly described in the present invention includes a frame body, the frame body is composed of a left longitudinal beam and a right longitudinal beam, and a first crossbeam, a second crossbeam and a third crossbeam connected between the left longitudinal beam and the right longitudinal beam are made of aluminum alloy through integral die-casting, and a plurality of rear suspension mounting points are provided on the frame body; a rear floor front reinforcement beam and a rear floor front crossbeam are provided at the front end of the frame body, and the two form a cavity structure with the left longitudinal beam, the right longitudinal beam and the first crossbeam; a rear floor front section panel, a rear floor middle section panel and a rear floor rear section panel are provided on the upper surface of the frame body from front to back, and the rear floor front section panel can be adjusted according to different seat heights; the left beam front section and the right beam front section are connected to the outer sides of the front of the left longitudinal beam and the right longitudinal beam of the frame body respectively; the front cutting edges of the left beam front section and the right beam front section can be extended or shortened according to the wheelbase requirements of the vehicle; a left rear bulge connector and a right rear bulge connector are connected to the middle of the left longitudinal beam and the right longitudinal beam of the frame body respectively.

[0008] Furthermore, the left side of the rear part of the frame body is connected to the left side of the rear section of the left beam, and the right side of the rear section of the right beam is connected to the right side; the left side plate of the rear floor is riveted on the left side of the rear section of the left beam, and the right side plate of the rear floor is riveted on the right side of the rear section of the right beam; the material of the left side beam rear section and the right side beam rear section is aluminum alloy, which is formed by integral extrusion.

[0009] Furthermore, reinforcing ribs are respectively provided on the left longitudinal beam, the right longitudinal beam, the first cross beam, the second cross beam and the third cross beam of the frame body.

[0010] Furthermore, a plurality of rear suspension mounting points are provided below the frame body.

[0011] Furthermore, the rear portion of the rear floor middle panel is sunken and flush with the rear floor rear panel.

[0012] Furthermore, the outer sides of the front portions of the left longitudinal beam and the right longitudinal beam of the frame body are connected to the front section of the left beam and the front section of the right beam respectively through a riveting process.

[0013] Furthermore, the left rear bulge connector includes a left rear bulge connector front section and a left rear bulge connector rear section; the right rear bulge connector includes a right bulge connector front section and a right bulge connector front section; all four are made of galvanized sheet and are connected to the frame body by riveting.

[0014] Furthermore, the front section of the left rear bulge connector, the rear section of the left rear bulge connector, the front section of the right bulge connector and the upper part of the front section of the right bulge connector are respectively provided with overlapping edges; the four are welded together with the car side through the overlapping edges.

[0015] Furthermore, the side surfaces of the left rear floor panel and the right rear floor panel are provided with flanges, and the two are respectively welded to the side panels of the car through the flanges.

[0016] Furthermore, it also includes a battery mounting bracket arranged under the front end of the frame body; the battery mounting bracket is composed of a left mounting beam, a middle mounting beam and a right mounting beam connected to form an "I" shape; a first battery mounting point is provided on the left mounting beam, and a second battery mounting point is provided on the right mounting beam.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] By converting the two longitudinal beams and three cross beams of the traditional two-longitudinal and three-cross structure into a frame structure through one-piece die-casting of aluminum alloy, the number of components is reduced, and the collision performance and safety performance of the entire vehicle are improved; the rear wheel bulge and related components are also integrated into the frame body, with a high degree of integration. Compared with the traditional rear floor assembly, the accumulated errors in the welding process are also reduced; the upper cross beam of the traditional rear floor assembly is also eliminated, reducing the weight of the rear floor assembly.

[0019] Since all rear suspension mounting points are located on the frame body, not only can the overlap levels be reduced, but also the cumulative error caused by welding multiple components can be reduced, thereby improving the position accuracy of the rear suspension mounting points.

[0020] Since the material of the rear section of the left beam and the rear section of the right beam is aluminum alloy and is formed through one-piece extrusion, it can collapse and deform when the whole vehicle collides, protecting the frame body from damage, thereby reducing the maintenance cost of the whole vehicle.

[0021] Because the front edges of the left and right front beams can be extended or shortened to match the vehicle's wheelbase, the same floor assembly structure can be used for vehicles with varying wheelbases, achieving platform-based and universal design. Furthermore, the front section of the rear floor panel can be adjusted to suit different seat heights, meeting the requirements of different vehicle models.

[0022] Since the front section and the rear section of the bulge connector are connected to the frame body by riveting respectively, the front section and the rear section of the bulge connector are made of galvanized sheet material, which can avoid electrochemical corrosion when in contact with the frame body; the front section and the rear section of the bulge connector can be welded to the side of the car at their upper overlapping edges. Through the front section and the rear section of the bulge connector, direct contact between the side of the car and the frame body is avoided, the amount of galvanized sheet of the side of the car is reduced, and the rear floor assembly can also be directly welded to the side of the car through these two parts without bolting or riveting.

[0023] Because the rear part of the middle section of the rear floor panel is sunken and flush with the rear section of the rear floor panel, sufficient space is created for the rear floor luggage area, facilitating the layout of the luggage box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an exploded view of the present invention;

[0025] Figure 2 is an axonometric view of the frame body of the present invention;

[0026] Figure 3 yes Figure 2 Bottom view of

[0027] Figure 4 is an axonometric drawing of the present invention;

[0028] Figure 5 This Figure 4 A top view of

[0029] Figure 6 yes Figure 5 A-A sectional view;

[0030] Figure 7 yes Figure 5 Bottom view of

[0031] Figure 8 It is a structural diagram of the battery mounting bracket;

[0032] In the figure (technical features indicated by marks):

[0033] 10—frame body, 101—left longitudinal beam, 102—right longitudinal beam, 103—first cross beam, 104—second cross beam, 105—third cross beam, 106—suspension mounting point, 107—reinforcement rib;

[0034] 11—Front reinforcement beam of rear floor; 12—Front cross beam of rear floor; 13—Front section panel of rear floor; 14—Middle section panel of rear floor; 15—Rear section panel of rear floor; 16—Front section of left beam; 17—Front section of right beam; 18—Front section of left bulge connector; 19—Rear section of left bulge connector; 20—Front section of right bulge connector; 21—Rear section of right bulge connector; 22—Rear section of left beam; 23—Left panel of rear floor; 24—Rear section of right beam; 25—Right panel of rear floor;

[0035] 26—battery mounting bracket, 261—left mounting beam, 262—middle mounting beam, 263—right mounting beam, 264—first battery mounting point, 265—second battery mounting point. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0037] See also Figures 1 to 8 The adjustable steel-aluminum hybrid rear floor assembly shown in the figure includes a frame body 10, which is composed of a left longitudinal beam 101 and a right longitudinal beam 102. A first crossbeam 103, a second crossbeam 104, and a third crossbeam 105 connected between the left and right longitudinal beams are made of aluminum alloy through integral die-casting. A plurality of rear suspension mounting points 106 are provided on the frame body 10; a rear floor front reinforcement beam 11 and a rear floor front crossbeam 12 are provided at the front end of the frame body 10, and the two together with the left longitudinal beam 101, the right longitudinal beam 102, and the first crossbeam 103 form a cavity structure to improve the collision performance and safety performance of the entire vehicle; on the top of the frame body 10 From front to back, the rear floor front panel 13, the rear floor middle panel 14, and the rear floor rear panel 15 are arranged in sequence. The rear floor front panel 13 can be adjusted to different seat heights. The left and right longitudinal beam front sections 16 and 17 are connected to the outer sides of the front of the left and right longitudinal beams 101 and 102 of the frame body 10, respectively, to transmit the longitudinal force of the vehicle and enhance the vehicle's collision performance. The front edges of the left and right longitudinal beam front sections 16 and 17 can be extended or shortened according to the vehicle's wheelbase requirements. The left and right rear bulge connectors are connected to the middle of the left and right longitudinal beams 101 and 102 of the frame body 10, respectively. The front edges of the left and right beam front sections can be extended or shortened according to the vehicle's wheelbase requirements, meeting the need to use the same floor assembly structure for vehicles with different wheelbases, achieving platformization and universalization. In addition, the rear floor front panel can be adjusted to different seat heights to meet the requirements of different vehicle models.

[0038] The left side of the rear frame 10 is connected to a left beam rear section 22, and the right side is connected to a right beam rear section 24. These sections transmit longitudinal forces and enhance collision resistance. A left rear floor panel 23 is riveted to the left beam rear section 22, while a right rear floor panel 25 is riveted to the right beam rear section 24. Both the left and right beam rear sections 22 and 24 are extruded from aluminum alloy, enabling them to collapse and deform in a collision, protecting the frame from damage and reducing vehicle repair costs.

[0039] Reinforcement ribs 107 are respectively provided on the left longitudinal beam 101 , the right longitudinal beam 102 , the first cross beam 103 , the second cross beam 104 and the third cross beam 105 of the frame body 10 to further enhance the structural strength of the frame body.

[0040] A plurality of rear suspension mounting points 106 are provided under the frame body 10. Providing all rear suspension mounting points on the frame body can not only reduce the overlap layers, but also reduce the cumulative error caused by welding of multiple components, thereby improving the position accuracy of the rear suspension mounting points.

[0041] The rear portion of the rear floor middle section panel 14 is sunken and flush with the rear floor rear section panel 15 , so as to free up enough space for the rear floor luggage box area and facilitate the arrangement of the luggage box.

[0042] The outer sides of the front portions of the left longitudinal beam 101 and the right longitudinal beam 102 of the frame body 10 are connected to the left beam front section 16 and the right beam front section 17 respectively through a riveting process.

[0043] The left rear bulge connector includes a left rear bulge connector front section 18 and a left rear bulge connector rear section 19; the right rear bulge connector includes a right bulge connector front section 20 and a right bulge connector front section 21; all four are made of galvanized sheet metal and are connected to the frame body 10 by riveting, which can avoid direct contact between the car side and the frame body and reduce the amount of galvanized sheet metal used in the car side; the left rear bulge connector and the right rear bulge connector are made of galvanized sheet metal, which can avoid electrochemical corrosion when in contact with the frame body.

[0044] The left rear baffle connector front section 18, the left rear baffle connector rear section 19, the right baffle connector front section 20, and the right baffle connector front section 21 are each provided with overlapping edges. These overlapping edges are welded to the vehicle side panels. This prevents direct contact between the vehicle side panels and the frame, reduces the amount of galvanized sheet metal used in the vehicle side panels, and allows the rear floor assembly to be welded directly to the vehicle side panels via these overlapping edges, without the need for bolts or rivets.

[0045] The side surfaces of the rear floor left panel 23 and the rear floor right panel 25 are provided with flanges, and the two are respectively welded to the side panels of the vehicle through the flanges.

[0046] The frame body 10 also includes a battery mounting bracket 6, located below the front end. The bracket is formed by connecting a left mounting beam 261, a middle mounting beam 262, and a right mounting beam 263, forming an "I" shape. A first battery mounting point 264 is provided on the left mounting beam 261, and a second battery mounting point 265 is provided on the right mounting beam 263. This ensures the installation and sealing requirements of the CTV battery solution. If the CTV solution is not required, the bracket can be removed.

Claims

1. An adjustable steel-aluminum hybrid automobile rear floor assembly, comprising a frame body (10), characterized by: The frame body (10) is composed of a left longitudinal beam (101) and a right longitudinal beam (102); a first crossbeam (103), a second crossbeam (104) and a third crossbeam (105) connected between the left longitudinal beam and the right longitudinal beam are formed by integral die-casting of aluminum alloy; a plurality of rear suspension mounting points (106) are provided on the frame body (10); a rear floor front reinforcement beam (11) and a rear floor front crossbeam (12) are provided at the front end of the frame body (10); the two and the left longitudinal beam (101), the right longitudinal beam (102) and the first crossbeam (103) form a cavity structure; a rear floor front section is provided on the upper surface of the frame body (10) from front to back. The invention relates to a vehicle body comprising a front panel (13), a rear floor middle panel (14) and a rear floor rear panel (15), wherein the rear floor front panel (13) can be adjusted according to different seat heights; a left beam front section (16) and a right beam front section (17) are connected to the outer sides of the front parts of the left longitudinal beam (101) and the right longitudinal beam (102) of the frame body (10), respectively; the front cut edges of the left beam front section (16) and the right beam front section (17) can be extended or shortened according to the requirements of the vehicle wheelbase; a left rear bulge connecting piece and a right rear bulge connecting piece are connected to the middle parts of the left longitudinal beam (101) and the right longitudinal beam (102) of the frame body (10); The left rear bulge connector includes a left rear bulge connector front section (18) and a left rear bulge connector rear section (19); the right rear bulge connector includes a right bulge connector front section (20) and a right bulge connector rear section (21); all four are made of galvanized sheet metal and are connected to the frame body (10) by riveting. The upper parts of the left rear bulge connecting piece front section (18), the left rear bulge connecting piece rear section (19), the right bulge connecting piece front section (20) and the right bulge connecting piece rear section (21) are respectively provided with overlapping edges; the four are welded to the vehicle side panel through the overlapping edges.

2. The adjustable steel-aluminum hybrid automobile rear floor assembly according to claim 1 is characterized in that: The left side of the rear portion of the frame body (10) is connected to a left beam rear section (22), and the right side is connected to a right beam rear section (24); a rear floor left plate (23) is riveted onto the left beam rear section (22), and a rear floor right plate (25) is riveted onto the right beam rear section (24); the left beam rear section (22) and the right beam rear section (24) are made of aluminum alloy and are formed by integral extrusion.

3. The adjustable steel-aluminum hybrid automobile rear floor assembly according to claim 1 or 2, characterized in that: The left longitudinal beam (101), the right longitudinal beam (102), the first cross beam (103), the second cross beam (104) and the third cross beam (105) of the frame body (10) are respectively provided with reinforcing ribs (107).

4. The adjustable steel-aluminum hybrid automobile rear floor assembly according to claim 1 or 2, characterized in that: A plurality of rear suspension mounting points (106) are provided below the frame body (10).

5. The adjustable steel-aluminum hybrid automobile rear floor assembly according to claim 1 or 2, characterized in that: The rear portion of the rear floor middle section panel (14) is sunken and flush with the rear floor rear section panel (15).

6. The adjustable steel-aluminum hybrid automobile rear floor assembly according to claim 1 or 2, characterized in that: The outer sides of the front portions of the left longitudinal beam (101) and the right longitudinal beam (102) of the frame body (10) are respectively connected to the left beam front section (16) and the right beam front section (17) through a riveting process.

7. The adjustable steel-aluminum hybrid automobile rear floor assembly according to claim 2 is characterized by: The side surfaces of the rear floor left panel (23) and the rear floor right panel (25) are provided with flanges, and the two are respectively welded to the side panels of the vehicle through the flanges.

8. The adjustable steel-aluminum hybrid automobile rear floor assembly according to claim 1 is characterized by: The invention also includes a battery mounting bracket (6) provided below the front end of the frame body (10); the battery mounting bracket (6) is formed by connecting a left mounting beam (261), a middle mounting beam (262) and a right mounting beam (263), forming an "I" shape; a first battery mounting point (264) is provided on the left mounting beam (261), and a second battery mounting point (265) is provided on the right mounting beam (263).

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