Automobile rear floor cross beam and longitudinal beam and connecting structure thereof

Abstract

The invention discloses an automobile rear floor cross beam and longitudinal beam and a connecting structure thereof, the automobile rear floor cross beam and longitudinal beam comprises a longitudinal beam and a cross beam, two ends of the cross beam are respectively and fixedly provided with a trapezoidal plate, and the large end of each trapezoidal plate is fixedly connected with the corresponding longitudinal beam; by means of the overall arrangement, when the cross beam is impacted by the outside, the trapezoidal plate can have a certain deformation space under the action of the trapezoidal cavity, so that the joint of the cross beam and the longitudinal beam has a certain displacement space, the joint of the cross beam and the longitudinal beam is prevented from being torn, and the service life of the cross beam and the longitudinal beam is prolonged. Impact force is buffered and absorbed, and loss is reduced to the maximum extent; meanwhile, when the impact force is opposite to the large head end of the trapezoidal plate, due to the structural arrangement of the trapezoidal plate and the trapezoidal cavity, the impact force can be dispersed to the two sides of the trapezoidal plate, and therefore transmission of the impact force is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile parts, in particular to a rear floor cross beam and longitudinal beam of an automobile and a connecting structure thereof. BACKGROUND

[0002] It is well known that the cross beam is an important component in the structure of an automobile, which is a beam transverse to the longitudinal beam and arranged along the short axis of the automobile. The cross beam not only ensures the torsional stiffness of the frame and bears the longitudinal load, but also supports the main components of the automobile.

[0003] The rear longitudinal beam is a cornerstone in the structure of an automobile and plays a crucial role in the vehicle structure. It is formed by interweaving two strong longitudinal beams and multiple cross beams, like a pillar in the skeleton of the vehicle. The longitudinal beam is part of the body frame and plays a role in supporting the body, which can collapse to absorb energy in a severe collision. The rear longitudinal beam is located below the trunk and is usually stamped from low-alloy steel sheets, and can be curved, equal-section or non-equal-section in shape in the horizontal plane or longitudinal plane according to the requirements of the form and structural arrangement of the automobile. In order to meet the strength requirements, the longitudinal beam sometimes presents a channel or I-shaped structure, and sometimes even adopts a box section.

[0004] The connecting structure of the rear floor cross beam and longitudinal beam of an automobile usually adopts riveting or welding technology to ensure rigidity and stability.

[0005] However, the existing rear floor cross beam and longitudinal beam of an automobile, when one side of the cross beam is subjected to external impact, the impact force is easily transmitted to the other side of the cross beam through the longitudinal beam, which easily causes the cross beam and the longitudinal beam to tear to different degrees, thereby causing irreversible damage.

[0006] Therefore, it is necessary to invent a rear floor cross beam and longitudinal beam of an automobile and a connecting structure thereof. SUMMARY

[0007] The purpose of the present application is to provide a rear floor cross beam and longitudinal beam of an automobile and a connecting structure thereof to solve the problem that the existing rear floor cross beam and longitudinal beam of an automobile, when one side of the cross beam is subjected to external impact, the impact force is easily transmitted to the other side of the cross beam through the longitudinal beam, which easily causes the cross beam and the longitudinal beam to tear to different degrees, thereby causing irreversible damage.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a rear floor cross beam and longitudinal beam of an automobile and a connecting structure thereof: comprising a longitudinal beam and a cross beam, wherein: two ends of the cross beam are respectively fixedly installed with trapezoidal plates, and the large end of the trapezoidal plate is fixedly connected with the corresponding longitudinal beam.

[0009] Preferably, a trapezoidal cavity with the same shape as the trapezoidal plate is provided through the trapezoidal plate.

[0010] Preferably, the longitudinal beam is provided with a cavity, and a connecting hole one is formed through the cavity of the longitudinal beam for connecting with the cross beam.

[0011] Preferably, a fixing hole is formed through the cross beam for connecting with the rear floor of the automobile.

[0012] Preferably, a plurality of bending grooves are uniformly arranged on the surface of the cross beam, the length of the bending grooves is the same as the length of the cross beam, and at least one reinforcing plate is fixedly installed on the bottom surface of the cross beam and arranged perpendicularly between the cross beam and the reinforcing plate.

[0013] Preferably, a connecting plate is fixedly installed on the trapezoidal plate and fixedly connected between the connecting plate and the corresponding longitudinal beam.

[0014] Preferably, a connecting hole two is formed through the connecting plate for connecting with the longitudinal beam.

[0015] The connecting structure of the cross beam and the longitudinal beam of the rear floor of the automobile comprises a connecting structure which is fixedly installed at the connecting position of the corresponding longitudinal beam and cross beam.

[0016] Preferably, the connecting structure comprises an L-shaped reinforcing plate, an outer reinforcing plate and a connecting ring, the outer side surface of the vertical plate of the L-shaped reinforcing plate is fixedly connected with the outer reinforcing plate through a plurality of connecting rings, the horizontal plate of the L-shaped reinforcing plate is fixedly installed in the corresponding cavity, and the outer reinforcing plate is fixedly connected with the large end of the corresponding trapezoidal plate.

[0017] Preferably, a connecting groove is formed on the outer surface of the horizontal plate of the L-shaped reinforcing plate, a connecting hole three is formed through the connecting groove of the L-shaped reinforcing plate, and the connecting plate is fixedly installed in the connecting groove.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] The trapezoidal plate can have a certain deformation space under the action of the trapezoidal cavity when the cross beam is subjected to external impact, so that the connecting position of the cross beam and the longitudinal beam has a certain displacement space, the connecting position of the cross beam and the longitudinal beam is prevented from being torn, the impact force is buffered and absorbed, and the loss is minimized; when the impact force is opposite to the large end of the trapezoidal plate, the impact force can be dispersed to both sides of the trapezoidal plate due to the structural arrangement of the trapezoidal plate and the trapezoidal cavity, so that the transmission of the impact force is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure diagram of the application.

[0021] Figure 2 is the exploded structure diagram of the longitudinal beam and the connecting structure of the application.

[0022] Figure 3 Figure 1 is a structural schematic diagram of the connection structure and the cross beam exploded structure of the present application.

[0023] Figure 4 Figure 2 is a structural schematic diagram of the longitudinal beam of the present application.

[0024] Figure 5 Figure 3 is a structural schematic diagram of the cross beam of the present application.

[0025] Figure 6 Figure 4 is a structural schematic diagram of the cross beam partially cut away of the present application.

[0026] Figure 7 Figure 5 is a structural schematic diagram of the connection structure of the present application.

[0027] In the figure:

[0028] Longitudinal beam 1, cross beam 2, bending groove 21, connection structure 3, L-shaped reinforcing plate 31, outer reinforcing plate 32, connecting ring 33, connecting groove 34, connecting hole three 35, recess 4, connecting hole one 5, fixing hole 6, trapezoidal plate 7, connecting plate 8, anti-loosening bolt 9, reinforcing plate 10, trapezoidal cavity 11, connecting hole two 12. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0030] Embodiment:

[0031] As shown in the accompanying drawings Figures 1-7

[0032] The automobile rear floor cross beam and longitudinal beam and the connection structure thereof provided by the present application comprise a longitudinal beam 1 and a cross beam 2, wherein: trapezoidal plates 7 are fixedly installed at both ends of the cross beam 2, and the large end of each trapezoidal plate 7 is fixedly connected with the corresponding longitudinal beam 1, so that the longitudinal beam 1 and the cross beam 2 have a certain energy absorption effect.

[0033] The longitudinal beam 1 and the cross beam 2 both adopt prior art, such as metal material, carbon fiber material, etc.

[0034] In the embodiment, a trapezoidal cavity 11 with the same shape as the trapezoidal plate 7 is provided through the trapezoidal plate 7, so that the trapezoidal plate 7 has a certain deformation space when subjected to external impact, and the impact force is dispersed to both sides of the trapezoidal plate 7, thereby absorbing and buffering the impact force and reducing the transmission of the impact force.

[0035] ​The trapezoidal plate 7 is made of the prior art, such as the alloy steel material in the prior art, but is not limited to only one material, and can be other materials with the same effect.

[0036] In the embodiment, the longitudinal beam 1 is provided with a cavity 4 for positioning and connecting the longitudinal beam 1 and the connecting structure 3, and ensuring the stability and strength of the longitudinal beam 1 and the connecting structure 3 after connection. The connecting hole one 5 is provided in the cavity 4 of the longitudinal beam 1, and is used for connecting the cross beam 2, so as to install corresponding fasteners, such as bolts, anchor bolts and the like, through the connecting hole one 5.

[0037] In the embodiment, the cross beam 2 is provided with a fixing hole 6 for connecting the automobile rear floor, and the cross beam 2 is fixedly connected with the automobile rear floor through the fixing hole 6 and other connecting members.

[0038] In the embodiment, the cross beam 2 is provided with a plurality of bending grooves 21 on the surface, so as to improve the transverse impact strength of the cross beam 2, support the two longitudinal beams when subjected to external impact, improve the strength of the cross beam 2, and avoid direct compression of the cross beam 2. The length of the bending groove 21 is the same as the length of the cross beam 2, and the cross beam 2 is fixedly provided with at least one reinforcing plate 10 on the bottom surface, which is arranged vertically between the cross beam 2, so as to improve the longitudinal impact strength of the cross beam 2 and avoid direct compression of the cross beam 2.

[0039] In the embodiment, the trapezoidal plate 7 is fixedly provided with a connecting plate 8, which is fixedly connected between the corresponding longitudinal beam 1, so as to improve the support strength between the trapezoidal plate 7 and the longitudinal beam 1.

[0040] In the embodiment, the connecting plate 8 is provided with a connecting hole two 12, which is used for connecting the longitudinal beam 1, so as to install corresponding fasteners, such as bolts, anchor bolts and the like, through the connecting hole two 12.

[0041] The automobile rear floor cross beam and longitudinal beam connecting structure comprises a connecting structure 3, which is fixedly installed at the connecting position of the corresponding longitudinal beam 1 and the cross beam 2, so as to improve the stability and strength of the connecting position of the longitudinal beam 1 and the cross beam 2, and to absorb energy and reduce the transmission of impact force when impact occurs.

[0042] In the embodiment, the connecting structure 3 comprises an L-shaped reinforcing plate 31, an outer reinforcing plate 32 and connecting rings 33. The outer side surface of the vertical plate of the L-shaped reinforcing plate 31 is fixedly connected with the outer reinforcing plate 32 through the connecting rings 33, such as welding, riveting and the like. Through the arrangement of the connecting rings 33, when subjected to external impact, the L-shaped reinforcing plate 31 has a certain compression space, thereby absorbing energy, reducing the transmission of impact force. The horizontal plate of the L-shaped reinforcing plate 31 is fixedly installed in the corresponding concave cavity 4, so as to position the connecting structure 3 when the connecting structure 3 is installed, and to ensure the flatness and strength between the connecting structure 3 and the longitudinal beam 1. Meanwhile, the longitudinal beam 1 can be shielded and protected, so as to avoid collision between the longitudinal beam 1 and the trapezoidal plate 7 when impacted. The outer reinforcing plate 32 is fixedly connected with the large end of the corresponding trapezoidal plate 7, such as welding, riveting and the like. Through the arrangement of the outer reinforcing plate 32, the stability and strength of the connecting portion between the trapezoidal plate 7 and the outer reinforcing plate 32 can be ensured. When impacted, the outer reinforcing plate 32 can resist the impact force and protect the longitudinal beam 1, so as to avoid collision between the trapezoidal plate 7 and the longitudinal beam 1, thereby preventing the longitudinal beam 1 from being deformed.

[0043] In the embodiment, the outer surface of the horizontal plate of the L-shaped reinforcing plate 31 is provided with a connecting groove 34, so as to position the cross beam 2 when the cross beam 2 is installed, and to improve the strength and flatness between the cross beam 2 and the L-shaped reinforcing plate 31. The connecting groove 34 of the L-shaped reinforcing plate 31 is provided with a connecting hole three 35, so as to install corresponding fasteners, such as bolts, anchor bolts and the like, in the connecting hole three 35. The connecting plate 8 is fixedly installed in the connecting groove 34.

[0044] In the embodiment, the anti-loosening bolt 9 is fixedly installed between the connecting hole one 5, the connecting hole two 12 and the connecting hole three 35. It is not limited to this kind of connecting member, but also other connecting members, such as anchor bolts, which have the same effect, so as to improve the stability and strength between the longitudinal beam 1, the cross beam 2 and the connecting structure 3, and to avoid the pressure acting on the welding points between the longitudinal beam 1, the cross beam 2 and the connecting structure 3.

[0045] In the present application, all kinds of components are standard components, and the specific connection mode of each part adopts the conventional means of thread, bolt, nesting and the like in the existing technology. Each structure adopts the conventional material in the existing technology, and will not be described in detail here.

[0046] In summary, the automobile rear floor cross beam and longitudinal beam and the connecting structure thereof are provided as a whole. When the cross beam is subjected to external impact, the trapezoidal plate can have a certain deformation space under the action of the trapezoidal cavity, so as to have a certain displacement space at the connecting portion of the cross beam and the longitudinal beam, prevent the connecting portion of the cross beam and the longitudinal beam from being torn, and buffer and absorb the impact force, thereby minimizing the loss. Meanwhile, when the impact force is opposite to the large end of the trapezoidal plate, due to the structural arrangement of the trapezoidal plate and the trapezoidal cavity, the impact force can be dispersed to both sides of the trapezoidal plate, thereby reducing the transmission of the impact force.

[0047] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and variations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A crossbeam and longitudinal beam for the rear floor of an automobile, characterized in that: It includes a longitudinal beam (1) and a transverse beam (2), wherein: a trapezoidal plate (7) is fixedly installed at both ends of the transverse beam (2), and the larger end of the trapezoidal plate (7) is fixedly connected to the corresponding longitudinal beam (1); A trapezoidal cavity (11) of the same shape as the trapezoidal plate (7) is provided through it.

2. The rear floor crossbeam and longitudinal beam of an automobile as described in claim 1, characterized in that: The longitudinal beam (1) is provided with a cavity (4), and a connecting hole (5) is provided through the cavity (4) of the longitudinal beam (1). The connecting hole (5) is used to connect with the crossbeam (2).

3. The automotive rear floor crossbeam and longitudinal beam as described in claim 2, characterized in that: The crossbeam (2) has a through hole (6) for connecting to the rear floor of the car.

4. The automotive rear floor crossbeam and longitudinal beam as described in claim 3, characterized in that: The surface of the crossbeam (2) is uniformly provided with multiple bending grooves (21), and at least one reinforcing plate (10) is fixedly installed on the bottom surface of the crossbeam (2).

5. The rear floor crossbeam and longitudinal beam of an automobile as described in claim 2, characterized in that: A connecting plate (8) is fixedly installed on the trapezoidal plate (7), and the connecting plate (8) is fixedly connected to the corresponding longitudinal beam (1).

6. The rear floor crossbeam and longitudinal beam of an automobile as described in claim 5, characterized in that: The connecting plate (8) has a through hole (12) for connecting to the longitudinal beam (1).

7. The connection structure between the rear floor crossbeam and longitudinal beam of an automobile as described in claim 1, characterized in that: It includes a connecting structure (3), which is fixedly installed at the connection between the longitudinal beam (1) and the transverse beam (2).

8. The connection structure between the rear floor crossbeam and longitudinal beam of an automobile as described in claim 7, characterized in that: The connecting structure (3) includes an L-shaped reinforcing plate (31), an outer reinforcing plate (32), and a connecting ring (33). The outer side of the vertical plate of the L-shaped reinforcing plate (31) is fixedly connected to the outer reinforcing plate (32) by a number of connecting rings (33). The horizontal plate of the L-shaped reinforcing plate (31) is fixedly installed in the corresponding cavity (4). The outer reinforcing plate (32) is fixedly connected to the large end of the corresponding trapezoidal plate (7).

9. The connection structure between the rear floor crossbeam and longitudinal beam of an automobile as described in claim 8, characterized in that: The outer surface of the L-reinforcing plate (31) is provided with a connecting groove (34), and a connecting hole (35) is provided through the connecting groove (34) of the L-reinforcing plate (31). The connecting plate (8) is fixedly installed in the connecting groove (34).

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