CN104163206B - Longitudinal floor beam assembly and vehicle rear body structure after vehicle - Google Patents

Abstract

The invention provides a vehicle rear floor longitudinal beam assembly and a vehicle rear structure. The vehicle rear floor longitudinal beam assembly is arranged above the vehicle rear floor, comprising: It is connected with the upper surface of the rear floor of the vehicle; the longitudinal beam reinforcement plate is arranged between the outer panel of the longitudinal beam and the rear floor of the vehicle, the main part of its cross section is U-shaped, and the first side of the U-shape is connected with the outer panel of the longitudinal beam, The end of the second side is connected with the rear wheel housing of the vehicle, and a connection point connected with the upper surface of the rear floor of the vehicle is provided on the second side; the longitudinal beam reinforcing plate forms a first cavity with the rear wheel housing of the vehicle and the outer panel of the longitudinal beam cavity, the side member reinforcement panel forms a second cavity with the side member outer panel and the vehicle rear floor. The vehicle rear structure includes the vehicle rear floor longitudinal beam assembly and the power battery installation beam whose lower surface is connected with the longitudinal beam outer panel and the vehicle rear floor. The structure of the invention can better decompose and transmit the impact force, and meanwhile has higher strength.

Description

Vehicle rear floor longitudinal beam assembly and vehicle rear structure

technical field

The invention relates to the field of vehicle technology, in particular to a vehicle rear floor longitudinal beam assembly and a vehicle rear structure.

Background technique

For various purposes and requirements, the structure of the vehicle body is different. According to the different load-bearing forms, the body can be divided into non-load-bearing body and load-bearing body. In order to reduce the weight of the body and rationalize the structure of the body, more and more More and more vehicles adopt monocoque body design.

With the increasingly fierce competition in the vehicle market, customers have higher and higher requirements for vehicle safety performance. In the event of a collision accident, the vehicle must minimize the damage to the vehicle and its internal structure on the premise of protecting the personal safety of the occupants in the vehicle. Therefore, the structural design of the vehicle, especially the rear structure of the vehicle, must have good collision resistance. Energy absorption and force transmission effect. As the main part of the rear structure of the vehicle to decompose and transmit the collision force, the design of the rear floor longitudinal beam assembly is particularly important.

At present, when vehicle manufacturers design and produce vehicles, the rear floor longitudinal beam assembly is arranged at the lower part of the rear floor. In this way, the impact load of the rear suspension shock absorber on the body will be first transmitted to the rear floor and the rear wheel housing welding. area, so it is easy to cause cracking at the weld between the rear floor and the rear wheel housing.

In the prior art, it is also necessary to add some brackets or reinforcing plates as installation hard points to complete the installation of the rear sub-frame, but these brackets or reinforcing plates are only used for installing the rear sub-frame, and are not beneficial to the overall structure of the rear of the vehicle. Strength and stiffness contribute very little. In addition, if the rear structure of this vehicle is used for a hybrid vehicle, more reinforcement plates need to be added to install power batteries and motor controllers. This not only increases the weight of the vehicle body, but also increases the production cost of the vehicle.

Contents of the invention

Features and advantages of the invention are set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention.

In order to overcome the problems of the prior art, the present invention provides a vehicle rear floor longitudinal beam assembly and a vehicle rear structure, the vehicle rear floor longitudinal beam assembly is arranged on the upper surface of the vehicle rear floor, and the vehicle rear floor longitudinal beam assembly Chengzhong's longitudinal beam outer plate and longitudinal beam reinforcement plate form two cavities with the vehicle rear wheel house and the vehicle rear floor, so that the vehicle rear floor and the vehicle rear wheel house do not need to be directly welded, and the cavity structure is used to better decompose and transmit the collision force.

The technical solution adopted by the present invention to solve the problems of the technologies described above is as follows:

According to one aspect of the present invention, a vehicle rear floor longitudinal beam assembly is provided, comprising: a longitudinal beam outer plate, located above the vehicle rear floor, one end connected to the vehicle rear wheel housing, and the other end connected to the upper surface of the vehicle rear floor The longitudinal beam reinforcement plate is arranged between the outer panel of the longitudinal beam and the upper surface of the rear floor of the vehicle. The end of the second side of the vehicle is connected to the rear wheel housing of the vehicle, and the second side is provided with a connection point connected to the upper surface of the rear floor of the vehicle; the longitudinal beam reinforcement plate is connected to the rear wheel housing of the vehicle and the outer A panel forms a first cavity, and the side rail reinforcement panel forms a second cavity with the side rail outer panel and the vehicle rear floor.

According to one embodiment of the present invention, it also includes a threaded pipe reinforcement plate, one end of which is connected to the U-shaped first side or the U-shaped bottom of the stringer reinforcement plate, and the other end is connected to the U-shaped second side of the stringer reinforcement plate , and divide the first cavity into two sub-cavities.

According to an embodiment of the present invention, it further includes a threaded pipe located in the first cavity and connected with the threaded pipe reinforcing plate.

According to an embodiment of the present invention, at least one end of the threaded pipe reinforcement plate is provided with a flange structure.

According to an embodiment of the present invention, the outer panel of the longitudinal beam is provided with a flange structure at one end connected with the rear wheel housing of the vehicle.

The vehicle rear floor longitudinal beam assembly according to claim 1, characterized in that, the end of the U-shaped second side of the longitudinal beam reinforcing plate is provided with a flange structure for connecting with the rear wheel housing of the vehicle.

According to an embodiment of the present invention, the connection point where the end of the second side of the U-shape of the longitudinal beam reinforcement plate is connected to the rear wheel housing of the vehicle is located below the horizontal line where the lower surface of the rear floor of the vehicle is located.

According to one embodiment of the present invention, the U-shaped second side of the side member reinforcement plate is connected to the upper surface at the end of the rear floor of the vehicle.

According to another aspect of the present invention, a vehicle rear structure is provided, including: any of the vehicle rear floor longitudinal beam assemblies described above; panel and the rear floor of the vehicle.

According to an embodiment of the present invention, the cross-section of the power battery installation beam is U-shaped, and flange structures for connecting with the outer panel of the longitudinal beam and the rear floor of the vehicle are provided at the two ends of the U-shape.

The invention provides a vehicle rear floor longitudinal beam assembly and a vehicle rear structure. The vehicle rear floor longitudinal beam assembly is arranged on the upper surface of the vehicle rear floor, and the longitudinal beam outer plate in the vehicle rear floor longitudinal beam assembly And the longitudinal beam reinforcement plate forms two cavities with the vehicle rear wheel cover and the vehicle rear floor, so that the rear floor and the rear wheel cover do not need to be directly welded, and at the same time, the cavity structure is used to better decompose and transmit the collision force. The present invention also installs the threaded pipe for installing the sub-frame and the threaded pipe reinforcing plate in one of the cavities, and the threaded pipe reinforcing plate makes certain contribution to the overall strength and rigidity of the rear structure of the vehicle. When it is necessary to install the power battery in the rear structure of the vehicle, the lower surface of the power battery installation beam used to install the power battery is connected with the outer panel of the longitudinal beam and the rear floor of the vehicle at the same time, so that the force of the power battery on the rear floor of the vehicle To disperse.

Those of ordinary skill in the art will better understand the features and contents of these technical solutions by reading the description.

Description of drawings

The advantages and implementation methods of the present invention will be more obvious by referring to the accompanying drawings and describing the present invention in conjunction with examples below, wherein the content shown in the accompanying drawings is only used for explaining the present invention, and does not constitute any sense of the present invention The constraints, in the attached image:

FIG. 1 is a schematic structural view of a vehicle rear floor longitudinal beam assembly according to a first embodiment of the present invention.

FIG. 2 is a schematic structural view of a vehicle rear floor longitudinal beam assembly according to a second embodiment of the present invention.

FIG. 3 is a schematic structural view of a vehicle rear floor longitudinal beam assembly according to a third embodiment of the present invention.

FIG. 4 is a schematic diagram of a vehicle rear structure according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a power battery installation beam according to an embodiment of the present invention.

Detailed ways

As shown in Figure 1, a vehicle rear floor longitudinal beam assembly is provided, including: a longitudinal beam outer panel 10, located above the vehicle rear floor 60, one end connected to the vehicle rear wheel cover 50, and the other end connected to the upper surface of the vehicle rear floor Connected; the longitudinal beam reinforcement plate 20 is arranged between the longitudinal beam outer panel 10 and the upper surface of the vehicle rear floor 10, the main part of its cross section is U-shaped, and the first side of the U-shape is connected to the longitudinal beam outer panel 10 Connected, the U-shaped second side end is connected with the rear wheel housing 50 of the vehicle, and the second side is provided with a connection point connected to the upper surface of the rear floor of the vehicle; The longeron outer panel 10 forms a first cavity 71 , and the longeron reinforcement panel 20 together with the longeron outer panel 10 and the vehicle rear floor 60 forms a second cavity 72 . This structure saves the welding flanging required when the traditional rear floor longitudinal beam is arranged horizontally, and even if the thickness of the outer panel of the longitudinal beam is only 1 mm, it can basically meet the performance requirements of the vehicle body, effectively reducing the production cost Reduced mass of the rear floor stringer assembly.

In this embodiment, the connection point where the U-shaped second side end of the longitudinal beam reinforcement plate 20 is connected to the vehicle rear wheel house 50 is located below the horizontal line where the lower surface of the vehicle rear floor 60 is located; and the longitudinal beam The U-shaped second side of the reinforcing plate is connected to the upper surface at the end 61 of the rear floor of the vehicle.

In order to achieve better connection stability, the end of the U-shaped second side of the longitudinal beam reinforcement plate 20 is provided with a flanging structure 21 for connecting with the rear wheel house 50 of the vehicle, that is to say, the flanging structure 21 is at the The lower surface of the rear floor 60 of the vehicle is below the horizontal line; the side beam outer panel 10 is provided with a flange structure 11 at the end connected with the rear wheel housing 50 of the vehicle.

Wherein, because there is a connection relationship between the longitudinal beam reinforcement plate 20 and the vehicle rear wheel house 50, so different from the vehicle rear wheel house in the prior art, the structure of the vehicle rear wheel house 50 in the present invention will be from the vehicle rear floor 60 The position above the upper surface extends to the position below the lower surface of the vehicle rear floor 60, the vehicle rear wheel cover 50 participates in the formation of the cavity 71, and is not directly connected with the vehicle rear floor 60, effectively preventing the vehicle rear floor from colliding with the vehicle rear floor 60 in the prior art. Cracks occur at the welding place of the rear wheel cover of the vehicle.

Please continue to refer to FIG. 2 . FIG. 2 is a schematic structural diagram of a vehicle rear floor side member assembly according to a second embodiment of the present invention. In this embodiment, in addition to the longitudinal beam outer panel 10 and the longitudinal beam reinforcement plate 20, the vehicle rear floor longitudinal beam assembly also includes a threaded pipe reinforcement plate 30, one end of which is connected to the U-shaped first of the longitudinal beam reinforcement plate 20. side or U-shaped bottom, and the other end is connected with the U-shaped second side of the longitudinal beam reinforcement plate 20, and the first cavity is divided into two sub-cavities 711 and 712, wherein the sub-cavity 711 is formed by the vehicle rear wheel The cover 50 , the stringer outer panel 10 and the threaded tube reinforcement plate 30 are enclosed, while the sub-cavity 712 is surrounded by the threaded tube reinforcement plate 30 and the stringer reinforcement plate 20 . The threaded pipe reinforcing plate 30 makes the rear floor longitudinal beam assembly of the vehicle form a structure in which three cavities, the sub-cavities 711 and 712 and the second cavity 72, are connected in series, thereby making a certain contribution to the overall strength and rigidity of the rear structure of the vehicle. contribute.

At least one end of the threaded pipe reinforcing plate 30 is provided with a flange structure 31 for increasing the connection area with the longitudinal beam reinforcing plate 20 and making the connection more stable. In this embodiment, both ends of the threaded pipe reinforcing plate 30 are provided with flange structures 31 .

Please refer to FIG. 3 at the same time, the threaded pipe 40 for installing the subframe can also be connected to the threaded reinforcing plate 30, and the threaded pipe 40 is arranged in the first cavity 71, more precisely, in the Inside the sub-cavity 712 surrounded by the threaded pipe reinforcing plate 30 and the stringer reinforcing plate 20 . In this way, since the first cavity 71 is located above the rear floor of the vehicle 60, it is not necessary to add a reinforcement plate under the rear floor of the vehicle as a hard point for installation when installing the auxiliary bracket, which saves the space under the vehicle body and the number of parts, and simultaneously reduces the Cost of production.

Please refer to Fig. 4 and Fig. 5, the present invention also provides a vehicle rear structure mainly used for hybrid electric vehicles or battery electric vehicles, including: the vehicle rear floor longitudinal member assembly in any of the above-mentioned embodiments; power battery The installation beam 80 is used to install the power battery, and the lower surface is used to connect with the longitudinal beam outer panel 10 and the vehicle rear floor 60, and is used to disperse the force of the power battery on the vehicle rear floor; wherein the longitudinal beam outer panel 10 A motor controller can also be installed on it.

The cross-section of the power battery installation beam 80 is U-shaped, and the two ends of the U-shape are provided with flange structures 81 for connecting with the longitudinal beam outer panel 10 and the rear floor 60 of the vehicle. In this embodiment , the power battery installation beam 80 is installed along the left and right directions of the vehicle, so that the overall strength of the rear structure of the vehicle can be better enhanced.

Generally speaking, the impact load acting on the rear structure of the vehicle includes: the impact load of the rear wheel shock absorber on the body, the impact load of the mounting point of the rear sub-frame on the body, and the impact load of the motor controller. On the vehicle, it also includes the impact load of the power battery. In the present invention, these loads will be transmitted to the rear floor longitudinal beam assembly of the vehicle first, and then the rigid bodies connected in series with these cavities in the rear floor longitudinal beam assembly of the vehicle will be evenly distributed to the rear floor along the X-axis direction, so that there is no There will be the problem of cracking of the rear floor of the vehicle that often occurs in traditional cars. At the same time, the material thickness of the rear floor can be reduced to reduce the weight, or materials with good drawing performance can be selected to make the rear floor with complex shapes.

The invention provides a vehicle rear floor longitudinal beam assembly and a vehicle rear structure. The vehicle rear floor longitudinal beam assembly is arranged on the upper surface of the vehicle rear floor, and the longitudinal beam outer plate in the vehicle rear floor longitudinal beam assembly And the longitudinal beam reinforcement plate forms two cavities with the rear wheel cover of the vehicle and the rear floor of the vehicle, so that the rear floor and the rear wheel cover do not need to be directly welded. At the same time, the cavity structure is used to better decompose and transmit the collision force, preventing the rear floor of the vehicle The problem of cracking at the welding seam with the rear wheel housing of the vehicle.

In the present invention, one of the cavities is further divided into two sub-cavities by using the threaded tube reinforcing plate, so that the overall strength and rigidity of the rear structure of the vehicle are further strengthened. The threaded pipe connected with the threaded pipe reinforcement plate is located in the cavity and is used for installing the auxiliary bracket. This structure does not need to add a reinforcement plate under the rear floor of the vehicle as a hard point for installation, which not only saves the space under the vehicle body, but also reduces the number of parts and production costs.

When it is necessary to install a power battery in the rear structure of the vehicle, the lower surface of the power battery installation beam used to install the power battery is connected with the outer panel of the longitudinal beam and the rear floor of the vehicle at the same time, and the force of the power battery on the rear floor of the vehicle is carried out. At the same time, the power battery installation beam is installed along the left and right directions of the vehicle to strengthen the overall strength of the rear structure of the vehicle.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. Those skilled in the art can implement the present invention with various variants without departing from the scope and essence of the present invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. The above are only preferred feasible embodiments of the present invention, and are not intended to limit the scope of rights of the present invention. All equivalent changes made by using the description and drawings of the present invention are included in the scope of rights of the present invention.

Claims (10)

1. a longitudinal floor beam assembly after vehicle, is characterized in that, comprising:

Girder plate, be positioned at after vehicle above floor, one end is connected with vehicle rear wheel cover, and the other end is connected with the upper surface on floor after described vehicle;

Longitudinal beam reinforcing plate, between the upper surface being arranged at floor after described girder plate and vehicle, its cross-sectional plane base portion is U-shaped, described the first U-shaped limit is connected with described girder plate, described U-shaped Second Edge end is connected with described vehicle rear wheel cover, and described Second Edge is provided with the point of connection be connected with the upper surface on floor after described vehicle;

Described longitudinal beam reinforcing plate and described vehicle rear wheel cover and described girder plate form the first cavity, and after described longitudinal beam reinforcing plate and described girder plate and described vehicle, floor forms the second cavity.

2. longitudinal floor beam assembly after vehicle according to claim 1, it is characterized in that, also comprise threaded line pipe brace panel, U-shaped first limit or the U-shaped bottom of its one end and described longitudinal beam reinforcing plate are connected, the other end is connected with the U-shaped Second Edge of described longitudinal beam reinforcing plate, and described first cavity is separated into two sub-cavitys.

3. longitudinal floor beam assembly after vehicle according to claim 2, is characterized in that, also comprise threaded line pipe, is positioned at described first cavity, and is connected with described threaded line pipe brace panel.

4. longitudinal floor beam assembly after vehicle according to claim 2, is characterized in that, at least one end of described threaded line pipe brace panel is provided with turnup structure.

5. longitudinal floor beam assembly after vehicle according to claim 1, is characterized in that, one end that described girder plate is being connected with described vehicle rear wheel cover is provided with turnup structure.

6. longitudinal floor beam assembly after vehicle according to claim 1, is characterized in that, the U-shaped Second Edge end of described longitudinal beam reinforcing plate is provided with the turnup structure for being connected with described vehicle rear wheel cover.

7. longitudinal floor beam assembly after vehicle according to claim 1, is characterized in that, the point of connection that the U-shaped Second Edge end of described longitudinal beam reinforcing plate is connected with described vehicle rear wheel cover is in the position of below the horizon after described vehicle residing for the lower surface of floor.

8. longitudinal floor beam assembly after vehicle according to claim 1, is characterized in that, the U-shaped Second Edge of described longitudinal beam reinforcing plate is connected with the upper surface of end, floor after described vehicle.

9. a vehicle rear body structure, is characterized in that, comprising:

Longitudinal floor beam assembly after arbitrary vehicle as described in claim 1 ~ 8;

Electrokinetic cell installs crossbeam, and for installing electrokinetic cell, lower surface is used for being connected with floor after described girder plate and vehicle.

10. vehicle rear body structure according to claim 9, is characterized in that, the cross-sectional plane that described electrokinetic cell installs crossbeam is U-shaped, and is provided with the turnup structure for being connected with floor after described girder plate and vehicle in described two U-shaped ends.