Rear floor mounting structure

Abstract

The embodiment of the utility model provides a rear floor mounting structure. The rear floor mounting structure comprises a cab rear plate, a rear floor body, a rear plate supporting plate and a frame cross beam. The lower end of the cab rear plate is fixedly connected with the frame cross beam located under the cab rear plate through the rear plate supporting plate. A first bent part is arranged at one end, close to the cab rear plate, of the rear floor body, and the first bent part is arranged upwards in an inclined mode in the direction away from the frame cross beam; the first bending part is welded with the cab rear plate in a lap joint manner; and the first bending part, the frame cross beam and the cab rear plate form a triangular frame structure. By changing the lap joint mode of the rear floor and the cab rear plate, a triangular frame structure is formed, the torsional rigidity of the whole vehicle is improved, and the strength problem of the lap joint of the upper vehicle body and the lower vehicle body is solved.

Description

[Technical Field]

[0001] This application relates to the field of vehicle body structure technology, and in particular to a rear floor mounting structure. [Background Technology]

[0002] Currently, the overlap structure between the rear floor of the double-row cab and the rear panel of the driver's cab in commercial vehicles is as follows: Figures 1-2 As shown, all overlaps are in the Z-direction (height direction of the vehicle). This structure does not provide any X-direction (front-to-back direction of the vehicle) restraint on the rear panel of the cab, making it difficult to position the rear panel of the cab in the X-direction during installation on the vehicle, and it is prone to tilting forward and backward. At the overlap, the lower body is a closed cavity structure, while the rear panel of the cab is an L-shaped structure. This overlap structure makes the transition between the upper and lower body abrupt, which is not conducive to the transmission of force and is prone to sheet metal cracking at the overlap. [Utility Model Content]

[0003] This application proposes a rear floor mounting structure, which relates to the field of vehicle body structure technology. By changing the overlapping method between the rear floor and the rear panel of the cab, a triangular frame structure is formed, which improves the torsional rigidity of the whole vehicle and solves the strength problem at the joint between the upper and lower vehicle bodies.

[0004] This application provides a rear floor mounting structure including a cab rear panel, a rear floor body, a rear panel support plate, and a vehicle frame crossbeam;

[0005] The lower end of the rear panel of the cab is fixedly connected to the crossbeam of the frame located directly below the rear panel of the cab via the rear panel support plate.

[0006] The rear floor body has a first bend at one end near the rear panel of the cab, and the first bend is inclined upward in a direction away from the crossbeam of the frame; the first bend is overlapped and welded to the rear panel of the cab; the first bend, the crossbeam of the frame, and the rear panel of the cab form a triangular frame structure.

[0007] Optionally, a second bend is provided at the end of the first bend away from the rear floor body, the second bend being arranged parallel to the rear panel of the cab, and the second bend being overlapped and welded to the rear panel of the cab.

[0008] Optionally, the second bend is welded to the rear panel of the cab along the longitudinal direction of the vehicle.

[0009] Optionally, the second bending portion has multiple welding points to the rear panel of the cab, and the multiple welding points are arranged along the width direction of the vehicle.

[0010] Optionally, the first bending part is provided with a first flange near the inner side wall plate, the second bending part is provided with a second flange near the inner side wall plate, and the first flange and the second flange are overlap-welded with the inner side wall plate.

[0011] Optionally, the first flange and the second flange are integrally formed.

[0012] Optionally, the first flange and the second flange are provided with a sealing glue layer at the welding position with the inner side wall plate.

[0013] Optionally, the lower end of the cab rear plate is provided with a third bending part, the third bending part is arranged in a direction away from the first bending part, the upper end of the rear plate support plate is provided with a fourth bending part, the fourth bending part is arranged opposite to the third bending part and is fixedly connected through welding.

[0014] Optionally, the lower end of the rear plate support plate is fixedly connected with the frame cross beam through welding.

[0015] Optionally, the connection position between the rear floor body and the first bending part is fixedly connected with the frame cross beam through welding.

[0016] The first bending part is arranged at one end of the rear floor body near the cab rear plate, is overlap-welded with the cab rear plate through the first bending part, and forms a triangular frame structure with the frame cross beam and the cab rear plate, so as to improve the torsional stiffness of the whole vehicle and solve the strength problem of the overlap-welded position of the upper and lower vehicle bodies.

DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a schematic view of the mounting structure of the rear floor and the cab rear plate in the prior art;

[0019] Figure 2 It is a sectional view of the mounting structure of the rear floor and the cab rear plate in the prior art;

[0020] Figure 3 It is a schematic view of a rear floor mounting structure provided by the embodiments of the present application;

[0021] Figure 4 It is a partial sectional view of Figure 3

[0022] ​Figure 5 FIG. 1 is a schematic view of a mounting structure of a first flange, a second flange, and a side inner panel.

[0023] Legend of reference signs:

[0024] 1 - cab rear panel, 2 - rear floor body, 03 - rear floor, 3 - rear panel support plate, 4 - frame cross beam, 5 - side inner panel, 6 - third bending portion, 7 - fourth bending portion, 21 - first bending portion, 22 - second bending portion, 23 - first flange, 24 - second flange.

DETAILED DESCRIPTION

[0025] In order to better understand the technical solutions of the present specification, the embodiments of the present application will be described in detail below in combination with the drawings.

[0026] It should be clear that the described embodiments are only some of the embodiments of the present specification, rather than all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present specification.

[0027] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present specification. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0028] The technical solutions protected by the embodiments of the present application will be described in detail below in combination with the drawings.

[0029] Please refer to Figures 3-4 FIG. 1 is a schematic view of a mounting structure of a first flange, a second flange, and a side inner panel.

[0030] The lower end of the cab rear plate 1 is fixedly connected with the frame cross beam 4 located directly below the cab rear plate through the rear plate support plate 3. In specific implementation, the lower end of the cab rear plate 1 is fixedly connected with the upper end of the rear plate support plate 3, and the lower end of the rear plate support plate 3 is fixedly connected with the frame cross beam 4. As an implementation manner, the lower end of the cab rear plate 1 is provided with a third bending portion 6, the third bending portion 6 is arranged in a direction away from the first bending portion 21, the upper end of the rear plate support plate 3 is provided with a fourth bending portion 7, the fourth bending portion 7 is arranged opposite to the third bending portion 6 and is fixedly connected through welding. Such arrangement can facilitate the welding of the cab rear plate 1 and the rear plate support plate 3, and the welding area is large, which is beneficial to force transmission. The lower end of the rear plate support plate 3 is fixedly connected with the frame cross beam 4 through welding. As an implementation manner, the third bending portion 6 is arranged perpendicularly to the cab rear plate 1. The third bending portion 6 is bent from the cab rear plate 1, and the fourth bending portion 7 is bent from the upper end of the rear plate support plate 3.

[0031] The rear floor body 2 is provided with a first bending portion 21 at one end close to the cab rear plate 1, the first bending portion 21 is arranged upwardly in a direction away from the frame cross beam 4, the first bending portion 21 is bent from the rear floor body 2, and the rear floor body 2 and the first bending portion 21 together constitute the rear floor. The first bending portion 21 is lap-welded with the cab rear plate 1, and the first bending portion 21 and the cab rear plate 1 form X-direction lap-welding, i.e., lap-welding in the front-rear direction of the vehicle, the first bending portion 21, the cab rear plate 1 and the frame cross beam 4 constitute a triangular frame structure. Such arrangement can solve the problem of sharp transition of the upper / lower vehicle body, improve the torsional rigidity of the whole vehicle, reduce the stress at the lap-welding position and improve the strength.

[0032] As an implementation manner, the following measures are adopted to facilitate the lap-welding of the first bending portion 21 and the cab rear plate 1.

[0033] The first bending portion 21 is provided with a second bending portion 22 at one end away from the rear floor body 2, the second bending portion 22 is bent from the first bending portion 21, the second bending portion 22 is arranged parallel to the cab rear plate 1, and the second bending portion 22 is lap-welded on the cab rear plate 1. The second bending portion 22 and the cab rear plate 1 are welded in the front-rear direction of the vehicle, i.e., when the second bending portion 22 and the cab rear plate 1 are welded, the welding gun is arranged in the front-rear direction (i.e., X direction) of the vehicle for welding, and the welding points of the second bending portion 22 and the cab rear plate 1 are multiple, the multiple welding points are arranged in the width direction of the vehicle, and the multiple welding points can effectively improve the connection firmness of the second bending portion 22 and the cab rear plate 1. In specific implementation, the multiple welding points can be evenly arranged in the width direction of the vehicle, and the distance between adjacent two welding points can be set according to requirements, which can be 3 cm, 5 cm, 10 cm, etc.

[0034] In the vehicle manufacturing process, when the cab rear plate 1 is placed, the rear floor provides X-direction support for the cab rear plate 1, which can reduce the welding failure rate of the cab rear plate 1 during installation.

[0035] As an implementation manner, the connection between the rear floor body 2 and the first bending part 21 is fixedly connected with the frame cross beam 4 by welding. When welding, the welding gun is welded along the Z direction, that is, the height direction of the vehicle.

[0036] Further, referring to Figure 5 As shown, the first bending part 21 is provided with a first flange 23 near the side wall inner plate 5, and the second bending part 22 is provided with a second flange 24 near the side wall inner plate 5. The first flange 23 and the second flange 24 are both lap-welded with the side wall inner plate 5. In specific implementation, the width of the first flange 23 and the second flange 24 can be set as needed. The first flange 23 and the second flange 24 are integrally formed. Since the first bending part 21 of the rear floor forms X-direction lap with the cab rear plate 1, that is, forms lap along the front-rear direction of the vehicle, the first bending part 21 and the second bending part 22 only need to be bent at a small angle. Therefore, the welding edge of the lap of the first flange 23 and the second flange 24 with the side wall inner plate 5 is transitionally continuous without gaps, which is conducive to sealing glue coating and improves the sealing performance of the vehicle.

[0037] Further, the welding part of the first flange 23 and the second flange 24 with the side wall inner plate 5 is provided with a sealing glue layer. After the welding of the first flange 23 and the second flange 24 with the side wall inner plate 5 is completed, the sealing glue layer is formed by coating sealing glue at the welding part of the first flange 23 and the second flange 24 with the side wall inner plate 5, which can better play a sealing role and avoid rainwater / dust from entering the vehicle from the connection part.

[0038] The application is provided with the first bending part 21 at one end of the rear floor body 2 near the cab rear plate 1, which is lap-welded with the cab rear plate 1 through the first bending part 21. The first bending part 21, the frame cross beam 4 and the cab rear plate 1 form a triangular frame structure, thereby improving the torsional stiffness of the vehicle and solving the strength problem of the upper and lower vehicle body lap joints.

[0039] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rear floor mounting structure characterized by, The cab rear plate (1), the rear floor body (2), the rear plate support plate (3) and the frame cross beam (4) are included. The lower end of the cab rear plate (1) is fixedly connected with the frame cross beam (4) located directly below the cab rear plate through the rear plate support plate (3). The first bending part (21) is provided on one end of the rear floor body (2) close to the cab rear plate (1), and is arranged upwardly away from the frame cross beam (4).

2. The rear floor mounting structure according to claim 1, characterized by The second bending part (22) is provided on the other end of the first bending part (21) away from the rear floor body (2), and is arranged in parallel with the cab rear plate (1).

3. The rear floor mounting structure according to claim 2, characterized by The second bending part (22) is welded with the cab rear plate (1) along the front-rear direction of the vehicle.

4. The rear floor mounting structure according to claim 3, characterized by The welding points between the second bending part (22) and the cab rear plate (1) are multiple, and the multiple welding points are arranged along the width direction of the vehicle.

5. The rear floor mounting structure according to claim 2, characterized by The first bending part (21) is provided with a first flange (23) close to the side wall inner plate (5), and the second bending part (22) is provided with a second flange (24) close to the side wall inner plate (5).

6. The rear floor mounting structure according to claim 5, characterized by The first flange (23) and the second flange (24) are integrally formed.

7. The rear floor mounting structure according to claim 6, characterized by The first flange (23) and the second flange (24) are provided with a sealing adhesive layer at the welding position with the side wall inner plate (5).

8. The rear floor mounting structure according to claim 1, characterized by The lower end of the cab rear plate (1) is provided with a third bending part (6) arranged away from the first bending part (21), and the upper end of the rear plate support plate (3) is provided with a fourth bending part (7) arranged opposite to the third bending part (6) and fixedly connected through welding.

9. The rear floor mounting structure according to claim 1, characterized by The lower end of the rear plate support plate (3) is fixedly connected with the frame cross beam (4) through welding.

10. The rear floor mounting structure according to claim 1, characterized by The connection between the rear floor body (2) and the first bending part (21) is fixedly connected with the frame cross beam (4) through welding.

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