Body of electric motor car

Abstract

To reinforce a tunnel panel without occupying a space in a passenger compartment with a reinforcement more than necessary.SOLUTION: A body of an electric motor car includes: a tunnel panel forming a center tunnel extending along a vehicle front-back direction; an inner reinforcement joined to the tunnel panel from the inner side of the center tunnel; and an outer reinforcement disposed at a position offset from the inner reinforcement in the vehicle front-back direction and joined to the tunnel panel from the inner side of the center tunnel. An overlapping part where the outer reinforcement, the tunnel panel, and the inner reinforcement are overlapped is provided at a part of the tunnel panel.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a body of an electric vehicle.

[0002] The body of the electric vehicle disclosed in Patent Document 1 has a center tunnel in the center of the floor. A reinforcement joined to the outer wall of the center tunnel is provided inside the center tunnel. The reinforcement reinforces the panel that constitutes the center tunnel (hereinafter, sometimes referred to as the tunnel panel). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-123229 Summary of the Invention [Problem to be solved by the invention]

[0004] Various components are arranged inside the center tunnel. Therefore, it may not be possible to secure space inside the center tunnel to install a reinforcement. In such cases, the tunnel panel can be reinforced by installing a reinforcement on the outer wall of the center tunnel from the outside of the center tunnel (i.e., the passenger compartment side). However, this will narrow the passenger compartment. Also, it may not be possible to install a reinforcement on the outside of the center tunnel due to interference with parts arranged inside the passenger compartment. Therefore, this specification proposes a technology for reinforcing the tunnel panel without occupying more space inside the passenger compartment than necessary with a reinforcement. [Means for solving the problem]

[0005] The body of an electric vehicle of item 1 disclosed in this specification has a right floor panel, a left floor panel, a tunnel panel, an inner reinforcement, and an outer reinforcement. The tunnel panel extends from the right floor panel to the left floor panel, and is curved so as to protrude upward relative to the right floor panel and the left floor panel. The tunnel panel constitutes a center tunnel extending along the vehicle longitudinal direction. The inner reinforcement is joined to the tunnel panel from the inside of the center tunnel. The outer reinforcement is disposed at a position shifted in the vehicle longitudinal direction relative to the inner reinforcement, and is joined to the tunnel panel from the inside of the center tunnel. An overlapping portion where the outer reinforcement, the tunnel panel, and the inner reinforcement overlap is provided in a part of the tunnel panel.

[0006] In this body, the tunnel panel is reinforced by the inner reinforcement and the outer reinforcement. Since the inner reinforcement and the outer reinforcement overlap at the overlapping portion, the tunnel panel is reinforced over a wide range in the longitudinal direction of the vehicle. When an electric vehicle collides frontally, a load is applied to the tunnel panel along the longitudinal direction of the vehicle. At this time, the load applied to the tunnel panel is also shared by the inner reinforcement and the outer reinforcement. Therefore, deformation of the tunnel panel is suppressed. In addition, the amount of space available in the center tunnel and in the passenger compartment differs depending on the position in the longitudinal direction of the vehicle. In this body, the inner reinforcement can be provided in positions in the center tunnel where there is sufficient space, and the outer reinforcement can be provided in positions in the passenger compartment where there is sufficient space. Therefore, the tunnel panel can be reinforced without the reinforcement taking up more space in the passenger compartment than necessary. [Brief description of the drawings]

[0007] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3]4 is a perspective view of the center tunnel 40 before the outer reinforcement 60 is attached. FIG. [Figure 4] 4 is a cross-sectional view of the center tunnel 40 cut in the left-right direction of the vehicle at the position of the inner reinforcement 50. FIG. [Diagram 5] 1 is a cross-sectional view of the center tunnel 40 cut in the left-right direction of the vehicle at the overlapping portion 82. FIG. [Figure 6] 4 is a cross-sectional view of the center tunnel 40 cut in the left-right direction of the vehicle at the position of the outer reinforcement 60. FIG. [Figure 7] 1 is a cross-sectional view of the center tunnel 40 cut in the left-right direction of the vehicle at the overlapping portion 84. FIG. [Figure 8] 4 is a cross-sectional view of the center tunnel 40 cut in the left-right direction of the vehicle at the position of the inner reinforcement 70. FIG. [Figure 9] FIG. 3 is a cross-sectional view of the center tunnel 40 taken in the vehicle longitudinal direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The configuration of the technology disclosed in this specification will be described below item by item, following item 1 above. (Item 2) 2. The body according to item 1, wherein the outer reinforcement, the tunnel panel, and the inner reinforcement are welded at the overlapping portion. (Item 3) The body of item 1 or 2, further comprising a battery pack having a protrusion disposed within the center tunnel at a position below the outer reinforcement. (Item 4) The tunnel panel is An upper plate that constitutes an upper surface of the center tunnel; a right side panel extending downward from the upper panel and connected to the right floor panel; a left side plate extending downward from the upper plate and connected to the left floor panel; having a right bent portion in which the tunnel panel is bent along a right ridge line extending along the vehicle front-rear direction is provided at a boundary between the upper plate and the right side plate, a left bent portion in which the tunnel panel is bent along a left ridge line extending along the vehicle front-rear direction is provided at a boundary between the upper plate and the left side plate, The inner reinforcement is a right inner reinforcing portion disposed at a position spaced apart from the right bent portion and connected to the upper plate and the right side plate; a left inner reinforcement portion disposed at a position spaced from the left bend portion and connected to the top plate and the left side plate; having The body according to any one of items 1 to 3. (Item 5) The outer reinforcement is a right outer reinforcement portion disposed at a position spaced from the right bent portion and connected to the upper plate and the right side plate; a left outer reinforcement portion disposed at a position spaced from the left bend portion and connected to the top plate and the left side plate; having The body described in item 4. (Item 6) a first welded portion at which the right outer reinforcement portion, the right side plate, and the right inner reinforcement portion are welded together; a second welded portion at which the right outer reinforcement portion, the upper plate, and the right inner reinforcement portion are welded to each other; a third welded portion at which the left outer reinforcement portion, the upper plate, and the left inner reinforcement portion are welded to each other; a fourth welded portion at which the left outer reinforcement portion, the left side plate, and the left inner reinforcement portion are welded together; 6. The body of item 5, further comprising: (Item 7) The inner reinforcement is A first inner reinforcement arranged forwardly with respect to the outer reinforcement; A second inner reinforcement arranged rearwardly with respect to the outer reinforcement, having The body according to any one of items 1 to 6.

[0009] According to the configuration of item 2 above, the tunnel panel can be reinforced more effectively.

[0010] According to the configuration of item 3 above, in locations where sufficient gaps cannot be secured for the protruding portion of the battery pack, the tunnel panel can be reinforced by an outer reinforcement installed by utilizing the space within the vehicle cabin, and in locations where sufficient gaps can be secured for the protruding portion of the battery pack, the tunnel panel can be reinforced by an inner reinforcement installed by utilizing the space within the tunnel.

[0011] According to the configurations of the above items 4 to 6, each bent portion of the tunnel panel can be reinforced, and compression of the tunnel panel in the front-rear direction can be suppressed.

[0012] The body 10 of the embodiment shown in FIG. 1 is the body of an electric vehicle. In this specification, an electric vehicle means a vehicle that runs on a road surface by electricity. In each figure including FIG. 1, the arrow FR means the front of the vehicle, the arrow RR means the rear of the vehicle, the arrow RH means the right side of the vehicle, the arrow LH means the left side of the vehicle, the arrow UP means the upward direction, and the arrow DW means the downward direction. As shown in FIG. 1, the body 10 has a floor panel 20, a dash panel 30, and a center tunnel 40. The floor panel 20 is a panel that constitutes the floor of the vehicle compartment. The floor panel 20 has a right floor panel 20R that constitutes the floor of the right seat, and a left floor panel 20L that constitutes the floor of the left seat. The dash panel 30 extends upward from the front end of the floor panel 20. The dash panel 30 constitutes a wall that separates the vehicle compartment from the front compartment. The center tunnel 40 is provided so as to protrude upward from the floor panel 20. The center tunnel 40 is provided in the center in the left-right direction of the vehicle. The center tunnel 40 extends rearward from the dash panel 30.

[0013] 2 and 3 show enlarged views of the center tunnel 40. Also, FIG. 4 shows a cross-sectional view of the center tunnel 40 in the left-right direction of the vehicle. As shown in FIGS. 2 to 4, the center tunnel 40 has a tunnel panel 42. The tunnel panel 42 is disposed between the right floor panel 20R and the left floor panel 20L, and extends from the right floor panel 20R to the left floor panel 20L. The tunnel panel 42 is bent so as to protrude upward relative to the right floor panel 20R and the left floor panel 20L.

[0014] The tunnel panel 42 has an upper plate 42U, a right side plate 42R, and a left side plate 42L. The upper plate 42U constitutes the upper surface of the center tunnel 40. The right side plate 42R extends downward from the right end of the upper plate 42U and is connected to the right floor panel 20R. The right side plate 42R constitutes the right side of the center tunnel 40. The left side plate 42L extends downward from the left end of the upper plate 42U and is connected to the left floor panel 20L. The left side plate 42L constitutes the left side of the center tunnel 40. At the boundary between the upper plate 42U and the right side plate 42R, a right bent portion 45R is provided in which the tunnel panel 42 is bent along a right ridgeline 44R extending along the vehicle front-rear direction. At the boundary between the upper plate 42U and the left side plate 42L, a left bent portion 45L is provided in which the tunnel panel 42 is bent along a left ridgeline 44L extending along the vehicle front-rear direction. The tunnel panel 42 defines a center tunnel 40 that extends along the front-rear direction of the vehicle.

[0015] As shown in FIGS. 2 and 3, the body 10 has an inner reinforcement 50, an outer reinforcement 60, and an inner reinforcement 70 that reinforce the tunnel panel 42. The inner reinforcements 50 and 70 are joined to the tunnel panel 42 from the inside of the center tunnel 40. The outer reinforcement 60 is joined to the tunnel panel 42 from the outside of the center tunnel 40 (i.e., from the passenger compartment side). The inner reinforcement 50 is disposed in front of the outer reinforcement 60. As shown in FIG. 2, the rear end of the inner reinforcement 50 and the front end of the outer reinforcement 60 overlap at an overlapping portion 82. The inner reinforcement 70 is disposed in the rear of the outer reinforcement 60. As shown in FIG. 2, the rear end of the outer reinforcement 60 and the front end of the inner reinforcement 70 overlap at an overlapping portion 84.

[0016] As shown in Figs. 2 and 3, the inner reinforcement 50 is composed of two panels 50R and 50L. As shown in Fig. 4, the panel 50R is disposed below the right bent portion 45R with a gap therebetween. The panel 50R is welded to the tunnel panel 42 on both sides of the right bent portion 45R. That is, the panel 50R is welded to the upper plate 42U and welded to the right side plate 42R. The right bent portion 45R is reinforced by the panel 50R. The panel 50L is disposed below the left bent portion 45L with a gap therebetween. The panel 50L is welded to the tunnel panel 42 on both sides of the left bent portion 45L. That is, the panel 50L is welded to the upper plate 42U and welded to the left side plate 42L. The left bent portion 45L is reinforced by the panel 50L.

[0017] As shown in Figs. 2 and 3, the outer reinforcement 60 is composed of one panel. As shown in Fig. 6, the outer reinforcement 60 has a right outer reinforcement portion 60R and a left outer reinforcement portion 60L. The right outer reinforcement portion 60R extends while bending from a position in contact with the right side plate 42R to a position in contact with the upper plate 42U through the upper part of the right bent portion 45R. A gap is provided between the right outer reinforcement portion 60R and the right bent portion 45R. The right outer reinforcement portion 60R is welded to the tunnel panel 42 on both sides of the right bent portion 45R. That is, the right outer reinforcement portion 60R is welded to the right side plate 42R and is welded to the upper plate 42U. The right bent portion 45R is reinforced by the right outer reinforcement portion 60R. The left outer reinforcement portion 60L extends while bending from a position in contact with the left side plate 42L to a position in contact with the upper plate 42U through the upper part of the left bent portion 45L. A gap is provided between the left outer reinforcement part 60L and the left bent part 45L. The left outer reinforcement part 60L is welded to the tunnel panel 42 on both sides of the left bent part 45L. That is, the left outer reinforcement part 60L is welded to the left side plate 42L and also to the upper plate 42U. The left outer reinforcement part 60L reinforces the left bent part 45L.

[0018] FIG. 5 shows a cross section of the overlapping portion 82. As described above, in the overlapping portion 82, the inner reinforcement 50, the tunnel panel 42, and the outer reinforcement 60 overlap. The panel 50R of the inner reinforcement 50 and the right outer reinforcement portion 60R of the outer reinforcement 60 overlap at a welded portion 91 via the right side plate 42R. At the welded portion 91, the panel 50R, the right side plate 42R, and the right outer reinforcement portion 60R are welded. The panel 50R of the inner reinforcement 50 and the right outer reinforcement portion 60R of the outer reinforcement 60 overlap at a welded portion 92 via the upper plate 42U. At the welded portion 92, the panel 50R, the upper plate 42U, and the right outer reinforcement portion 60R are welded. The panel 50L of the inner reinforcement 50 and the left outer reinforcement portion 60L of the outer reinforcement 60 overlap at a welded portion 93 via the upper plate 42U. The panel 50L, the upper plate 42U, and the left outer reinforcement portion 60L are welded at a welded portion 93. The panel 50L of the inner reinforcement 50 and the left outer reinforcement portion 60L of the outer reinforcement 60 overlap with each other via the left side plate 42L at a welded portion 94. The panel 50L, the left side plate 42L, and the left outer reinforcement portion 60L are welded at a welded portion 94.

[0019] As shown in Figs. 2 and 3, the inner reinforcement 70 is composed of two panels 70R and 70L. As shown in Fig. 8, the panel 70R is disposed at a lower part of the right bent part 45R with a gap therebetween. The panel 70R is welded to the tunnel panel 42 on both sides of the right bent part 45R. That is, the panel 70R is welded to the upper plate 42U and welded to the right side plate 42R. The right bent part 45R is reinforced by the panel 70R. The panel 70L is disposed at a lower part of the left bent part 45L with a gap therebetween. The panel 70L is welded to the tunnel panel 42 on both sides of the left bent part 45L. That is, the panel 70L is welded to the upper plate 42U and welded to the left side plate 42L. The left bent part 45L is reinforced by the panel 70L.

[0020] FIG. 7 shows a cross section of the overlapping portion 84. As described above, in the overlapping portion 84, the outer reinforcement 60, the tunnel panel 42, and the inner reinforcement 70 overlap. The right outer reinforcement portion 60R of the outer reinforcement 60 and the panel 70R of the inner reinforcement 70 overlap at the welded portion 95 via the right side plate 42R. At the welded portion 95, the right outer reinforcement portion 60R, the right side plate 42R, and the panel 70R are welded. The right outer reinforcement portion 60R of the outer reinforcement 60 and the panel 70R of the inner reinforcement 70 overlap at the welded portion 96 via the upper plate 42U. At the welded portion 96, the right outer reinforcement portion 60R, the upper plate 42U, and the panel 70R are welded. The left outer reinforcement portion 60L of the outer reinforcement 60 and the panel 70L of the inner reinforcement 70 overlap at the welded portion 97 via the upper plate 42U. The left outer reinforcement part 60L, the upper plate 42U, and the panel 70L are welded at a welded portion 97. The left outer reinforcement part 60L of the outer reinforcement 60 and the panel 70L of the inner reinforcement 70 overlap with each other via the left side plate 42L at a welded portion 98. The left outer reinforcement part 60L, the left side plate 42L, and the panel 70L are welded at a welded portion 97.

[0021] As shown in FIG. 9, a battery pack 80 is disposed under the floor panel 20. The battery pack 80 supplies power to a driving motor (not shown). The battery pack 80 has a protruding portion 80a extending into the center tunnel 40. The protruding portion 80a is disposed under the outer reinforcement 60. At a position where a sufficient gap cannot be secured between the protruding portion 80a and the tunnel panel 42, there is no space left in the center tunnel 40. Therefore, at a position where a sufficient gap cannot be secured between the protruding portion 80a and the tunnel panel 42, the tunnel panel 42 is reinforced by the outer reinforcement 60. At a position where a sufficient gap can be secured between the protruding portion 80a and the tunnel panel 42, the tunnel panel 42 is reinforced by the inner reinforcement 50, 70. In this way, at a position where there is space left in the center tunnel 40, the inner reinforcement 50, 70 is provided inside the center tunnel 40, so that the tunnel panel 42 can be reinforced without occupying space in the vehicle interior. As described above, according to the body 10 of this embodiment, even if there is limited space in some parts of the center tunnel 40, the tunnel panel 42 can be reinforced without occupying more space than necessary inside the vehicle cabin.

[0022] When the vehicle collides in the front, a load is applied to the tunnel panel 42 along the axial direction (i.e., the vehicle front-rear direction). In particular, the load is applied to the right bent portion 45R and the left bent portion 45L along the vehicle front-rear direction. In the body 10 of the embodiment, the tunnel panel 42 (particularly, the right bent portion 45R and the left bent portion 45L) is reinforced by the inner reinforcement 50, the outer reinforcement 60, and the inner reinforcement 70. Since the inner reinforcements 50 and 70 overlap with the outer reinforcement 60 at the overlapping portions 82 and 84, the tunnel panel 42 is reinforced over a wide range in the vehicle front-rear direction. Therefore, when the vehicle collides in the front, deformation of the tunnel panel 42 is suppressed. In addition, since the inner reinforcement 50 is welded to the outer reinforcement 60 at the overlapping portion 82, the load is easily transmitted from the inner reinforcement 50 to the outer reinforcement 60. Moreover, since the outer reinforcement 60 is welded to the inner reinforcement 70 at the overlapping portion 84, the load is easily transmitted from the outer reinforcement 60 to the inner reinforcement 70. Therefore, the load can be favorably supported by the inner reinforcement 50, the outer reinforcement 60, and the inner reinforcement 70, and deformation of the tunnel panel 42 can be more favorably suppressed. In this way, according to the body 10 of the embodiment, the tunnel panel 42 can be appropriately reinforced.

[0023] In the body 10 of the embodiment, the protrusion 80a of the battery pack 80 is disposed inside the center tunnel 40 below the outer reinforcement 60. However, the part disposed inside the center tunnel 40 may be another part.

[0024] In the body 10 of the embodiment, the outer reinforcement 60 is disposed at a position rearward of the inner reinforcement 50 and forward of the inner reinforcement 70. However, the position of the outer reinforcement can be changed as appropriate depending on the arrangement of parts in the center tunnel. For example, the outer reinforcement may be provided at the front end of the center tunnel, and the inner reinforcement may be provided rearward of the outer reinforcement. Also, the outer reinforcement may be provided at the rear end of the center tunnel, and the inner reinforcement may be provided forward of the outer reinforcement. Also, multiple outer reinforcements may be provided distributed in the front-rear direction of the vehicle.

[0025] The panels 50R and 70R of the embodiment are an example of a right inner reinforcing portion, and the panels 50L and 70L of the embodiment are an example of a left inner reinforcing portion.

[0026] Although the embodiments have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes to the specific examples exemplified above. The technical elements described in this specification or drawings exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or drawings achieves multiple objectives simultaneously, and achieving one of the objectives itself has technical utility. [Explanation of symbols]

[0027] 10: Body 20L: Left floor panel 20R: Right floor panel 40: Center tunnel 42: Tunnel Panel 50: Inner reinforcement 60: Outer reinforcement 70: Inner Reinforcement

Claims

1. A body of an electric vehicle, Right floor panel, The left floor panel, a tunnel panel extending from the right floor panel to the left floor panel and curved so as to protrude upward relative to the right floor panel and the left floor panel, the tunnel panel constituting a center tunnel extending along a front-rear direction of the vehicle; An inner reinforcement joined to the tunnel panel from the inside of the center tunnel; An outer reinforcement is disposed at a position shifted in the vehicle front-rear direction with respect to the inner reinforcement and joined to the tunnel panel from the inside of the center tunnel; having An overlapping portion in which the outer reinforcement, the tunnel panel, and the inner reinforcement overlap is provided in a part of the tunnel panel. body.

2. The body according to claim 1 , wherein the outer reinforcement, the tunnel panel, and the inner reinforcement are welded to each other at the overlapping portion.

3. The body according to claim 1 or 2, further comprising a battery pack having a protrusion disposed within the center tunnel at a position below the outer reinforcement.

4. The tunnel panel is An upper plate that constitutes an upper surface of the center tunnel; a right side panel extending downward from the upper panel and connected to the right floor panel; a left side plate extending downward from the upper plate and connected to the left floor panel; having a right bent portion in which the tunnel panel is bent along a right ridge line extending along the vehicle front-rear direction is provided at a boundary between the upper plate and the right side plate, a left bent portion in which the tunnel panel is bent along a left ridge line extending along the vehicle front-rear direction is provided at a boundary between the upper plate and the left side plate, The inner reinforcement is a right inner reinforcing portion disposed at a position spaced apart from the right bent portion and connected to the upper plate and the right side plate; a left inner reinforcement portion disposed at a position spaced from the left bend portion and connected to the top plate and the left side plate; having 3. A body according to claim 1 or 2.

5. The outer reinforcement is a right outer reinforcement portion disposed at a position spaced from the right bent portion and connected to the upper plate and the right side plate; a left outer reinforcement portion disposed at a position spaced from the left bend portion and connected to the top plate and the left side plate; having The body of claim 4.

6. a first welded portion at which the right outer reinforcement portion, the right side plate, and the right inner reinforcement portion are welded to each other; a second welded portion at which the right outer reinforcement portion, the upper plate, and the right inner reinforcement portion are welded to each other; a third welded portion at which the left outer reinforcement portion, the upper plate, and the left inner reinforcement portion are welded to each other; a fourth welded portion at which the left outer reinforcement portion, the left side plate, and the left inner reinforcement portion are welded together; The body of claim 5 further comprising:

7. The inner reinforcement is A first inner reinforcement arranged forwardly with respect to the outer reinforcement; A second inner reinforcement arranged rearwardly with respect to the outer reinforcement; having 3. A body according to claim 1 or 2.

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