Vehicle bodies

Abstract

To provide a vehicle body for a vehicle which protects a high-voltage battery safely in situations of a side collision and a front collision of a vehicle.SOLUTION: A vehicle body for a vehicle includes: side chambers coupled to side surfaces of a vehicle body along an anteroposterior longitudinal direction; rear lower members each coupled to between the side chamber and a front side member; and a lower bar coupled to the rear lower members in a lateral direction and coupled to the side chambers.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vehicle body that safely protects a high voltage battery in side and frontal vehicle collision situations. [Background technology]

[0002] In the case of electric vehicles, there is no fuel tank but instead there is a high-voltage battery. Therefore, if a collision occurs to the high-voltage battery and the battery is damaged, it may lead to a fire, so it is necessary to protect the high-voltage battery in the event of a collision of an electric vehicle.

[0003] In the case of electric vehicles where the high-voltage battery is mounted under the center floor, the area around the high-voltage battery under the vehicle is surrounded by a reinforcement structure to prepare for a collision situation, which adds a lot of weight. Most high-voltage batteries are mounted in the side compartment (or rocker panel) of the vehicle body, which means that there is a lack of absolute collision absorption space compared to internal combustion engines. To prevent this, the inside of the side compartment or the side compartment itself is strengthened to prevent the barrier from penetrating into the barrier cell, thereby preparing for side collisions.

[0004] However, unlike a side collision, in a frontal collision, rather than the barrier intruding, the front subframe and PE room mounting parts are pushed backward by the impact of the barrier, and these parts hit the high-voltage battery directly, causing damage to the front part of the high-voltage battery. Therefore, there is a demand for a vehicle body structure that can protect the high-voltage battery in the event of a frontal collision as well as a side collision of an electric vehicle. The matters described as the background art are intended to enhance understanding of the background of the present invention and should not be construed as admitting that they correspond to prior art already known to those skilled in the art. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Korean Patent Publication No. 10-2019-0021167A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been devised to solve the above-mentioned problems, and an object of the present invention is to provide a vehicle body that safely protects a high-voltage battery in the event of a side collision or a frontal collision. [Means for solving the problem]

[0007] To achieve the above-mentioned object, the present invention is characterized by including a side chamber connected to both sides of the vehicle body along the longitudinal direction of the front and rear, a rear lower member connected between the side chamber and the front side member, and a lower bar connected laterally to the rear lower member and connected to the side chamber.

[0008] The side chambers may be connected to both ends of the lower bar to form a U-shape.

[0009] A side reinforcement member having a lattice-shaped cross section may be provided inside the side chamber along the longitudinal direction, and an end of the lower bar may be coupled to a front end of the side reinforcement member.

[0010] A through hole may be formed in the rear lower member in a lateral direction, and the lower bar may be coupled to the through hole by passing through the through hole.

[0011] A rib may be formed extending between the front and rear inner wall surfaces of the lower bar.

[0012] The lower bar may include a center lower bar and a side lower bar, and the rear lower member may be formed with a center insertion hole that opens inward in a lateral direction and side insertion holes that open outward, respectively, and the center lower bar may be inserted between the center insertion hole and the side lower bar may be inserted into the side insertion holes.

[0013] The side insertion holes are formed behind the center insertion hole, and the center lower bar can be positioned forward of the side lower bars.

[0014] A cover panel may be coupled to the rear lower member so as to cover an outer surface of the rear lower member and a portion where the side chamber and the lower bar are coupled.

[0015] The lower bar may be disposed at a regular interval in front of the high voltage battery.

[0016] The lower bar may be disposed at a regular interval behind the front subframe. [Effects of the Invention]

[0017] In the event of a frontal / offset / small overlap collision, the impact of the collision transmitted from the front side member is distributed to the left and right sides of the side chamber and lower bar as well as the rear lower member via the lower bar, thereby preventing damage to the rear lower member and the side chamber and safely protecting the battery.

[0018] In addition, in the event of a side collision, the impact of the collision transmitted to the side compartment is distributed to the front side members and lower bar via the rear lower member, effectively responding to the side collision and safely protecting the battery. [Brief explanation of the drawings]

[0019] [Figure 1]FIG. 10 is a view showing a configuration in which a lower bar penetrates a rear lower member and is connected to a side chamber in the present invention. [Figure 2] This is a diagram showing the state in which the high-voltage battery and the front side member are combined in FIG. [Figure 3] 1A and 1B are diagrams illustrating states before and after side reinforcing members are attached to both sides of a vehicle body according to the present invention. [Figure 4] 1A and 1B are diagrams illustrating states before and after side reinforcing members are attached to both sides of a vehicle body according to the present invention. [Figure 5] 1A and 1B are diagrams showing the state before and after the lower bar is connected to the vehicle body according to the present invention. [Figure 6] 1A and 1B are diagrams showing the state before and after the lower bar is connected to the vehicle body according to the present invention. [Figure 7] 1A and 1B are diagrams showing the state before and after the cover panel is joined to the vehicle body according to the present invention. [Figure 8] 1A and 1B are diagrams showing the state before and after the cover panel is joined to the vehicle body according to the present invention. [Figure 9] 10A and 10B are diagrams showing the structure of another embodiment of the lower bar consisting of a center lower bar and a side lower bar in the present invention. [Figure 10] 10A and 10B are diagrams for explaining the positional relationship between a lower bar, a high-voltage battery, and a front subframe in the present invention. [Figure 11] 10A and 10B are diagrams illustrating the effect of dispersing the impact of a collision when a frontal collision of a vehicle body occurs according to the present invention; [Figure 12] 10A and 10B are diagrams illustrating the effect of dispersing the impact of a collision in a front offset collision / small overlap collision of a vehicle body according to the present invention. [Figure 13] 10A and 10B are diagrams illustrating the effect of dispersing the impact of a collision when a side collision of a vehicle body occurs according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows a configuration in which a lower bar 30 according to the present invention is connected to a side chamber 10 by passing through a rear lower member 20, and FIG. 2 shows a configuration in which a high-voltage battery 60 and a front side member 50 are connected to each other in FIG. 1.

[0021] Referring to the figure, a center floor panel 1 is attached to the center of the lower part of the vehicle body, and a rear floor panel is attached behind the center floor panel 1.

[0022] A high-voltage battery 60 is mounted below the center floor panel 1, and the high-voltage battery 60 can be mounted on a part that forms the framework of the side of the vehicle body, for example, on the inner surface of the side chamber 10, and connected to the vehicle body.

[0023] A dash panel 52 is attached to the front of the vehicle body to separate the PE room from the interior of the passenger compartment, and front side members 50 are joined to both sides of the front of the dash panel 52 in the longitudinal direction.

[0024] In particular, in the present invention, a lower bar 30 is coupled between the side chambers 10 on both sides to protect the front and sides of the high-voltage battery 60.

[0025] Referring to the drawings, the vehicle body according to the present invention comprises a side chamber 10 connected to both sides of the vehicle body along the longitudinal direction, a rear lower member 20 connected between the side chamber 10 and a front side member 50, and a lower bar 30 connected laterally to the rear lower member 20 and connected to the side chamber 10.

[0026] For example, side rooms 10 are connected to both side surfaces of the center floor panel 1 along the longitudinal direction of the front and rear.

[0027] A lower bar 30 is connected between the side chambers 10 on both sides, and the lower bar 30 is connected to a rear lower member 20 connected between the front side member 50 and the side chambers 10.

[0028] That is, the lower bar 30 is connected laterally to the rear lower member 20 and between the side compartments 10 on both sides, so that in the event of a frontal collision, offset collision, or small overlap collision of the vehicle, the impact of the collision is transmitted from the front side member 50 to the side compartments 10 via the rear lower member 20. In particular, a significant portion of the load transmitted to the rear lower member 20 is dispersed to the left and right via the lower bar 30, preventing damage to the rear lower member 20 and the side compartments 10 and protecting the battery.

[0029] In addition, in the event of a side collision of the vehicle, the impact of the collision is dispersed and transmitted from the side chamber 10 via the lower bar 30 and the rear lower member 20 to the front side member 50, thereby making it possible to more effectively respond to a side collision and protect the battery compared to existing structures in which the impact of the collision is supported only by the side chamber 10.

[0030] In addition, in the present invention, the side chambers 10 are respectively connected to both ends of the lower bar 30 to form a 'U' shape. That is, both ends of the lower bar 30 are respectively connected to the front ends of the side chambers 10 on both sides, so that the lower bar 30 and the side chambers 10 are connected to form a 'U' shape.

[0031] Therefore, the left and right side chambers 10 and the left and right rear lower members 20 are firmly connected via the lower bar 30, strengthening the connectivity, thereby increasing the torsional rigidity and bending rigidity of the PE room body and dispersing the impact of a frontal / side collision in multiple directions to the left and right.

[0032] 3 and 4 are diagrams showing the state before and after the side reinforcing members are attached to both sides of the vehicle body according to the present invention. Referring to the figure, a side reinforcement member 12 having a lattice-shaped cross section is provided in the longitudinal direction inside the side chamber 10, and an end of a lower bar 30 can be connected to the front end of the side reinforcement member 12.

[0033] For example, the side reinforcement member 12 is extruded in the longitudinal direction and extends forward of the side chamber 10, and is assembled to the side of the vehicle body by a method such as SPR (Self Piercing Rivet) or FDS (Flow Drill Screw).

[0034] The side reinforcement member 12 is formed to have a lattice-like cross-sectional structure, and a tapping nut 14 (see Figure 6) is fixed inside the end of the cross section, so that the lower bar 30 is penetrated and bolted to the tapping nut 14.

[0035] In other words, by protecting the side of the vehicle body with the side reinforcement 12, it is possible to more efficiently respond to legal / commercial / atypical side collisions and safely protect the battery compared to a system in which the side chamber 10 alone supports the impact of a side collision.

[0036] 5 and 6 are diagrams showing the state before and after the lower bar 30 is coupled to the vehicle body according to the present invention. Referring to the figure, a through hole 22 is formed in the middle of a rear lower member 20 in the lateral direction, and a lower bar 30 is inserted through the through hole 22 and coupled thereto.

[0037] For example, the front end of the rear lower member 20 is connected to the bottom surface of the front side, and the rear end of the rear lower member 20 is connected to the front end of the side reinforcement 12, and they are connected to have a shape that surrounds the side of the side reinforcement 12.

[0038] The lower bar 30 is formed in a straight tubular shape with a rectangular closed end structure and is inserted into the through-hole 22, and the lower bar 30 is connected to the rear lower member 20 by fastening a nut to a bolt member that passes through the lower part of the rear lower member 20 at the through-hole 22.

[0039] That is, the lower bar 30 penetrates the rear lower member 20 and is connected to the front end of the side reinforcement member 12 to form a 'U' shape, thereby firmly connecting the left and right side chambers 10 and the left and right rear lower members 20 with the lower bar 30, thereby strengthening the connection.

[0040] Furthermore, ribs 32 (see FIG. 10) are formed inside the lower bar 30 so as to extend horizontally between the front and rear inner wall surfaces, thereby dividing the interior space into upper and lower sections.

[0041] That is, the ribs 32 formed inside the lower bar 30 increase the rigidity of the lower bar 30, thereby preventing the lower bar 30 from bending or being damaged when a collision impact is applied to the lower bar 30. However, the lower bar 30 may be configured as a single, straight lower bar 30 or may be divided into three parts.

[0042] 9 is a diagram showing the structure of another embodiment of the lower bar 30 according to the present invention, which is made up of a center lower bar 34 and a side lower bar 36. The lower bar 30 includes a center lower bar 34 and a side lower bar 36.

[0043] Referring to the drawings, a center insertion hole 24 that opens laterally inward and side insertion holes 26 that open laterally are formed in the middle of the rear lower member 20, and a center lower bar 34 can be inserted between the center insertion hole 24, and a side lower bar 36 can be inserted into the side insertion holes 26. Here, the center lower bar 34 and the side lower bar 36 can be formed to have the same cross-sectional shape as the lower bar 30 described above.

[0044] In addition, side insertion holes 26 are formed behind the center insertion hole 24, so that the center lower bar 34 is positioned forward of the side lower bar 36. That is, center insertion holes 24 are formed on the inner surfaces of the left and right rear lower members 20, and both ends of a center lower bar 34 are inserted between the center insertion holes 24.

[0045] Side insertion holes 26 are formed on the outer surfaces of the left and right rear lower members 20, respectively, and one end of a side lower bar 36 is inserted into the side insertion holes 26, so that the other end of the side lower bar 36 can be connected to the front end of the side reinforcement member 12.

[0046] That is, the center lower bar 34 and the side lower bar 36 are inserted into the rear lower member 20 and connected to the front end of the side reinforcement member 12 to form a 'U' shape, thereby firmly connecting the left and right side chambers 10 and the left and right rear lower members 20 through the center lower bar 34 and the side lower bar 36, thereby strengthening the connection.

[0047] 7 and 8 are diagrams showing the state before and after the cover panel 40 is coupled to the vehicle body in the present invention. Referring to the same figure, a cover panel 40 may be coupled to the outer surface of the rear lower member 20 and to cover the portion where the side chamber 10 and the lower bar 30 are coupled.

[0048] For example, after the cover panel 40 is joined to the periphery by spot welding, a bolt can be inserted through the cover panel 40 and the lower bar 30 and connected to the tapping nut of the side reinforcement member 12 .

[0049] On the other hand, FIG. 10 is a diagram for explaining the positional relationship between the lower bar 30, the high-voltage battery 60, and the front subframe 70 in the present invention. Referring to the same figure, the lower bar 30 may be disposed in front of the high voltage battery 60 at a regular interval.

[0050] The lower bar 30 may be disposed at a regular interval behind the front subframe 70 . However, the distance between the lower bar 30 and the high-voltage battery 60 may be longer than the distance between the lower bar 30 and the front subframe 70 .

[0051] In other words, in the event of a frontal collision of the vehicle, since the front subframe 70 is disposed with a gap between it and the lower bar 30, if the load applied to the front subframe 70 is not large, the load will not be transmitted to the lower bar 30, and the vehicle body can be protected.

[0052] In particular, the lower bar 30 is disposed behind the front subframe 70 and is spaced a certain distance from the high-voltage battery 60. This allows the lower bar 30 to support the front subframe when it is pushed rearward, and also prevents the high-voltage battery 60 and high-voltage cables from being struck and damaged when the front subframe 70 is pushed rearward. This allows the high-voltage battery 60 to be protected more safely.

[0053] Meanwhile, FIG. 11 is a diagram for explaining the effect of dispersing the impact of a collision when a frontal collision of a vehicle body occurs according to the present invention. Explaining with reference to the same figure, when a vehicle collides head-on, the impact of the collision is transmitted from the front side members 50 on both sides to the rear lower members 20 and lower bars 30 on both sides.

[0054] Therefore, the load transmitted to the rear lower members 20 on both sides is transmitted to the side chambers 10 on both sides, and the load transmitted to the lower bar 30 is transmitted to the side chambers 10 while being dispersed to the left and right of the lower bar 30.

[0055] Therefore, the impact of a collision transmitted to both front side members 50 is dispersed to many parts of the vehicle body via the lower bar 30, preventing damage to the rear lower member 20 and the side chamber 10 and safely protecting the battery.

[0056] FIG. 12 is a diagram illustrating the effect of dispersing the impact of a collision when a vehicle is in a front offset collision / small overlap collision according to the present invention. Explaining with reference to FIG. 1, in the event of a vehicle offset collision / small overlap collision, the impact of the collision is transmitted from one front side member 50 to one rear lower member 20 and lower bar 30.

[0057] Therefore, the load transmitted to the rear lower member 20 on one side is transmitted to the side chamber 10 on one side, and the load transmitted to the lower bar 30 is transmitted to the side chamber 10 on one side while being distributed to the left and right of the lower bar 30.

[0058] Therefore, the impact of a collision transmitted to one front side member 50 is dispersed to many parts of the vehicle body via the lower bar 30, thereby preventing damage to the rear lower member 20 and the side chamber 10 and safely protecting the battery.

[0059] FIG. 13 is a diagram for explaining the effect of dispersing the impact of a collision when a side collision of a vehicle body occurs according to the present invention. Explaining with reference to the figure, when a vehicle is involved in a side collision, the impact of the collision is transmitted to one end of one rear lower member 20 and lower bar 30 via one side chamber 10.

[0060] Therefore, the load transmitted to one rear lower member 20 is transmitted to one front side member 50, and the load transmitted to one end of the lower bar 30 is transmitted to the other end of the lower bar 30, thereby distributing the load.

[0061] Therefore, the impact of a collision transmitted to the side chamber 10 is dispersed to many parts of the vehicle body via the lower bar 30, thereby effectively responding to a side collision and safely protecting the battery.

[0062] Although the present invention has been described in detail based on the above-mentioned specific examples, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and it goes without saying that such modifications and variations are within the scope of the appended claims.

[0063] That is, although the present invention has been described with reference to an electric vehicle equipped with a high-voltage battery 60, the lower bar 30 can also be applied to the connecting structure between the front side member 50 and the side chamber 10 of an internal combustion engine vehicle as well as an electric vehicle. [Explanation of symbols]

[0064] 1 Center floor panel 10 Concubine 12 Side reinforcement 14 Tapping nut 20 Rear lower member 22 through holes 24 Center insertion hole 26 Side insertion hole 30 Lower Bar 32 Ribs 34 Center Lower Bar 36 Side Lower Bar 40 Cover Panel 50 Front side member 52 Dash panel 60 High Voltage Battery 70 Front subframe

Claims

1. Side frame members connected to both sides of the vehicle body along the longitudinal direction and installed below the passenger door of the vehicle body; a rear lower member connected between the side frame member and the front side member; a lower bar connected laterally to the rear lower member and connected to the side frame member, The rear lower member is formed with a center insertion hole that opens inward in the lateral direction and side insertion holes that open outward, A center lower bar is inserted between the center insertion holes, A side lower bar is inserted into the side insertion hole, The lower bar is disposed at a regular interval in front of the high-voltage battery, The lower bar is disposed at a regular interval behind the front subframe, A vehicle body, wherein a distance between the lower bar and the high-voltage battery is longer than a distance between the lower bar and the front subframe.

2. 2. The vehicle body according to claim 1, wherein the side frame members are respectively coupled to both ends of the lower bar to form a U-shape.

3. A side reinforcement member having a lattice-shaped cross section is provided inside the side frame member along the longitudinal direction, 2. The vehicle body according to claim 1, wherein an end of the lower bar is connected to a front end of the side reinforcement member.

4. A through hole is formed in the rear lower member in the lateral direction, The vehicle body according to claim 1, wherein the lower bar is coupled to the through hole by passing through the through hole.

5. 2. The vehicle body according to claim 1, wherein a rib is formed extending between the front and rear inner wall surfaces of the lower bar.

6. 2. The vehicle body according to claim 1, wherein the side insertion holes are formed rearward of the center insertion hole, and the center lower bar is positioned forward of the side lower bars.

7. 2. The vehicle body according to claim 1, wherein a cover panel is coupled to the rear lower member so as to cover an outer surface of the rear lower member and a portion where the side frame member and the lower bar are coupled.

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