Vehicle undercarriage

Abstract

In a structure in which a portion of a bracket attached to the inclined part of the floor is positioned above the horizontal part of the floor, the present invention provides a vehicle understructure that can suppress deformation of the bracket during vehicle production and use. [Solution] The vehicle understructure 10 includes a bracket 1 fixed to the floor panel 2 and supporting a wire harness 3. The floor panel 2 has a floor inclined portion 21c that is inclined with respect to the horizontal direction, and a floor horizontal portion 21b that extends horizontally from the lower end of the floor inclined portion 21c. The bracket 1 has a harness support portion 16 that supports the wire harness 3, an inclined portion 11 positioned on the upper surface of the floor inclined portion 21c, and a lower horizontal portion 13 connected to the lower end of the inclined portion 11 and extending horizontally above the floor horizontal portion 21b. A bead 18a is formed at the connection portion 18 between the inclined portion 11 and the lower horizontal portion 13, extending from the inclined portion 11 side toward the lower horizontal portion 13 side.

Description

Technical Field

[0001] The present invention relates to a vehicle underbody structure including a bracket for fixing a wire harness to a floor panel.

Background Art

[0002] In-vehicle components such as wire harnesses are fixed to a floor panel disposed at the bottom of a vehicle such as an automobile via brackets. As an example of such a bracket, Patent Document 1 discloses a bracket having a lower plate portion fixed to a floor panel, an upper plate portion fixed to an in-vehicle component, and a vertical plate portion that stands up from an end portion of the lower plate portion and connects the lower plate portion and the upper plate portion. In Patent Document 1, since the vertical plate portion is likely to be stepped on by a passenger walking on the floor panel, the vertical plate portion is formed in a U shape in a top view in order to ensure the rigidity of the vertical plate portion against a load from above.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, a floor panel having a concavo-convex shape has a floor inclined portion inclined in the horizontal direction and a floor horizontal portion extending horizontally from the lower end portion of the floor inclined portion. For example, a rear floor panel disposed at the bottom of the rear portion of the vehicle is formed in a convex shape in which the central portion in the vehicle width direction bulges upward, and has a floor inclined portion that slopes downward from the outer edge portion in the vehicle width direction of the horizontal floor central portion toward the outside in the vehicle width direction, and a floor side portion (floor horizontal portion) that extends horizontally outward in the vehicle width direction from the lower end portion of the floor inclined portion.

[0005] Brackets for wire harnesses routed on floor panels are sometimes attached to sloping sections of the floor for layout reasons. Such brackets are particularly susceptible to loads if a portion of them is positioned above the horizontal section of the floor. For example, during vehicle production, they are easily stepped on by workers working on the floor panels. During vehicle use, they are easily hit by occupants' feet or luggage, or stepped on by occupants. Therefore, measures to suppress deformation of the brackets may be required.

[0006] Therefore, the present invention aims to provide a vehicle understructure that can suppress deformation of the bracket during vehicle production and use, in a structure in which a part of the bracket attached to the inclined part of the floor is positioned above the horizontal part of the floor. [Means for solving the problem]

[0007] One aspect of the present invention is a vehicle understructure comprising a bracket fixed to a floor panel located at the bottom of a vehicle and supporting a wire harness, wherein the floor panel has a floor inclined portion that is inclined with respect to the horizontal direction and a floor horizontal portion that extends horizontally from the lower end of the floor inclined portion. In this vehicle understructure, the bracket has a harness support portion that supports the wire harness, an inclined portion located on the upper surface of the floor inclined portion, and a lower horizontal portion connected to the lower end of the inclined portion and extending horizontally above the floor horizontal portion, wherein a bead is formed at the connection portion between the inclined portion and the lower horizontal portion, extending from the inclined portion side toward the lower horizontal portion side. [Effects of the Invention]

[0008] According to one aspect of the present invention, in a structure in which a part of a bracket attached to the inclined floor portion is positioned above the horizontal floor portion, it is possible to provide a vehicle understructure that can suppress deformation of the bracket during vehicle production and use. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view of a vehicle understructure according to one embodiment of the present invention. [Figure 2] Figure 1 is a cross-sectional view of the vehicle's understructure. [Figure 3] This is a magnified view of a portion of Figure 2. [Figure 4] This is a perspective view of the bracket alone. [Figure 5] Figure 4 is a cross-sectional view of the bracket along line AA. [Figure 6] This is a side view of the upper corner and upper reinforcement section as seen from the front of the vehicle. [Figure 7] This is a side view of the intermediate corner and intermediate reinforcement section as seen from the front of the vehicle. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will now be described with reference to the accompanying drawings. Figure 1 is a perspective view of a vehicle understructure 10 according to one embodiment of the present invention, viewed from above through the rear door opening 101 on the right side of the vehicle. Figure 2 is a cross-sectional view of the vehicle understructure cut by a vertical plane extending in the vehicle width direction. Note that in Figure 1, the carpet 5 and rear seats etc. located above the floor panel 2 have been removed.

[0011] In the drawings, arrow Fr indicates the front in the longitudinal direction of the vehicle, and arrow U indicates the upward direction in the vertical direction of the vehicle (hereinafter simply referred to as the vertical direction). Arrow L indicates the left side in the vehicle width direction when the vehicle is viewed from the rear towards the front, and arrow R indicates the right side in the vehicle width direction when the vehicle is viewed from the rear towards the front. In the following description, "front" and "rear" correspond to the front and rear in the longitudinal direction of the vehicle, respectively, and "up" and "down" correspond to the up and down in the vehicle vertical direction, respectively. Also, "left" and "right" correspond to the left and right in the vehicle width direction when the vehicle is viewed from the rear towards the front. Furthermore, in this specification, "horizontal direction" means a direction that is perpendicular or approximately perpendicular to the vertical direction, and does not mean only a perfectly horizontal direction, but a substantially horizontal direction is sufficient.

[0012] As shown in Figures 1 and 2, the vehicle understructure 10 includes a structure for fixing a wire harness 3, which is routed on the floor panel 2, to the floor panel 2 by a bracket 1. The floor panel 2 is a plate-shaped metal member located in the lower part of the vehicle and constituting the floor portion of the vehicle body. The floor panel 2 includes a rear floor panel 21 located at the rear of the vehicle and a main floor panel located in front of the rear floor panel 21. In this embodiment, the vehicle understructure 10 is applied as an understructure at the rear of the vehicle and is configured to fix the wire harness 3 to the rear floor panel 21.

[0013] The rear floor panel 21 has a central floor portion 21a, left and right floor side portions 21b (horizontal floor portions) positioned to the left and right of the central floor portion 21a, and left and right inclined floor portions 21c that connect the central floor portion 21a and the left and right floor side portions 21b in the vehicle width direction. The central floor portion 21a and each floor side portion 21b extend in the vehicle width direction (horizontal direction) and the vehicle longitudinal direction, with the central floor portion 21a positioned above the left and right floor side portions 21b. The inclined floor portions 21c are inclined with respect to the vehicle width direction (horizontal direction) and extend in the vehicle longitudinal direction. The inclined floor portions 21c are inclined downward as they are directed outward in the vehicle width direction, and the floor side portions 21b extend in the vehicle width direction outward from the lower end of the inclined floor portions 21c. In this embodiment, the floor side portions 21b correspond to the "horizontal floor portion" according to the present invention, and the vehicle width direction corresponds to the "horizontal direction" according to the present invention.

[0014] Below the left and right floor sides 21b, left and right rear side members 4 are positioned, extending in the longitudinal direction of the vehicle, and the rear floor panel 21 is joined to the left and right rear side members 4, respectively. The left and right rear side members 4 are each part of the high-rigidity vehicle frame that forms the skeleton of the vehicle.

[0015] The rear floor panel 21 is covered from above by a carpet 5, and a rear seat (not shown) that can slide in the longitudinal direction of the vehicle is positioned above the rear floor panel 21. Above the left and right floor inclined sections 21c, left and right slide rails (not shown) attached to the carpet 5 are positioned to guide the rear seat in the longitudinal direction of the vehicle. The left and right slide rails are supported by left and right seat brackets 102 fixed to the rear floor panel 21, and reinforcements 103 extending in the vehicle width direction are joined to the left and right seat brackets 102.

[0016] The wire harness 3 includes a first wire harness 31 routed from outside the vehicle to inside the vehicle through a hole formed in the rear floor panel 21, and a second wire harness 32 routed from the main floor panel to the rear floor panel 21. The first wire harness 31 is, for example, for an electric parking brake (EPB). The first wire harness 31 has a long cable and a connector 31a attached to the end of the cable. The second wire harness 32 has a long cable and a connector 32a attached to the end of the cable. The connectors 31a and 32a are connected to each other.

[0017] As shown in Figures 1 and 2, the vehicle understructure 10 includes a bracket 1 that is fixed to the floor panel 2 and supports the wire harness 3. The bracket 1 is positioned in the space between the rear floor panel 21 and the carpet 5 below the right slide rail.

[0018] FIG. 3 is an enlarged cross-sectional view of a part of FIG. 2. For simplicity of the drawing, the carpet 5 and the protector 6 are removed. FIG. 4 is a perspective view of the bracket 1 seen from above. As shown in FIGS. 2 to 4, the bracket 1 includes a lower inclined portion 11 and an upper inclined portion 12 disposed on the upper surface of the floor inclined portion 21c, a lower horizontal portion 13 connected to the lower end portion of the lower inclined portion 11 and disposed above the floor side portion 21b, a vertical portion 14 extending upward from the upper end portion of the lower inclined portion 11, and an upper horizontal portion 15 extending in the vehicle width direction (horizontal direction) from the upper end portion of the vertical portion 14. Further, the bracket 1 has a harness support portion 16 for supporting the wire harness 3, and a first protector fixing portion 171 and a second protector fixing portion 172 to which a protector 6 for covering the bracket 1 and the wire harness 3 from above is fixed. The bracket 1 is an integrally formed product manufactured by bending a single sheet of sheet metal and has a width in the vehicle front-rear direction. In the present embodiment, the lower inclined portion 11 corresponds to the "inclined portion" according to the present invention, and the first protector fixing portion 171 corresponds to the "protector fixing portion" according to the present invention.

[0019] The lower inclined portion 11 and the upper inclined portion 12 are disposed on the upper surface of the right floor inclined portion 21c (hereinafter simply referred to as the floor inclined portion 21c) and extend along the upper surface of the floor inclined portion 21c. Therefore, the lower inclined portion 11 and the upper inclined portion 12 are inclined downward as they go outward in the vehicle width direction. The upper inclined portion 12 is disposed at a position away from the lower inclined portion 11 above in the inclination direction of the floor inclined portion 21c. The lower inclined portion 11 and the upper inclined portion 12 are joined (fixed) to the floor inclined portion 21c as will be described in detail later, whereby the bracket 1 is attached to the floor inclined portion 21c.

[0020] The lower horizontal portion 13 is connected to the lower end portion of the lower inclined portion 11 via a connection portion 18 to be described later. The lower horizontal portion 13 extends in the vehicle width direction (horizontal direction) above the right floor side portion 21b (hereinafter simply referred to as the floor side portion 21b) and faces upward. The lower horizontal portion 13 is disposed at a distance from the upper surface of the floor side portion 21b and is supported cantileveredly by the lower inclined portion 11 fixed to the floor inclined portion 21c.

[0021] The vertical portion 14 extends in the vertical direction and faces outward in the vehicle width direction. The harness support portion 16 is provided on the vertical portion 14 and is configured to support the connectors 31a and 32a that are connected to each other among the wire harnesses 3. In the illustrated example, the harness support portion 16 has a locking hole that penetrates the vertical portion 14 in the thickness direction (vehicle width direction). As shown in FIGS. 2 and 3, a locked portion 31b that protrudes in the radial direction of the cable is provided on the side surface of the connector 31a. The locked portion 31b is configured to be inserted into the locking hole of the harness support portion 16 from the outside in the vehicle width direction and locked to the peripheral edge portion of the locking hole. With such a harness support portion 16 and the locked portion 31b, the connectors 31a and 32a are attached to the vertical portion 14 from the outside in the vehicle width direction (in the horizontal direction). The harness support portion 16 (locking hole) is provided at an intermediate position in the vertical direction of the vertical portion 14, and the entire connectors 31a and 32a supported by the harness support portion 16 are disposed below the upper horizontal portion 15. The harness support portion 16 may be configured to support the connectors 31a and 32a by other methods.

[0022] The upper horizontal portion 15 extends in the vehicle width direction from the upper end portion of the vertical portion 14 toward the side opposite to the lower inclined portion 11 (that is, inward in the vehicle width direction) and faces upward. The end portion of the upper horizontal portion 15 opposite to the vertical portion 14 is connected to the lower end portion of the upper inclined portion 12.

[0023] The first protector fixing portion 171 is provided on the lower horizontal portion 13, and the second protector fixing portion 172 is provided on the upper horizontal portion 15. The first protector fixing portion 171 and the second protector fixing portion 172 are each configured such that the protector 6 is fixed by a bolt (not shown). The protector 6 is, for example, a cover member having dimensions and a shape that cover substantially the entire bracket 1 excluding the upper inclined portion 12, the connectors 31a and 32a, and protects the bracket 1 and the connectors 31a and 32a.

[0024] In the illustrated example, the first protector fixing part 171 has a first bolt hole 171a formed in the lower horizontal part 13 and a first welded nut 171b welded to the lower surface of the lower horizontal part 13 (see Figure 5). The first bolt hole 171a penetrates the lower horizontal part 13 in the vertical direction, and the first welded nut 171b is arranged coaxially with the first bolt hole 171a. The second protector fixing part 172 has a second bolt hole 172a formed in the upper horizontal part 15 and a second welded nut 172b welded to the lower surface of the upper horizontal part 15 (see Figure 6). The second bolt hole 172a penetrates the upper horizontal part 15 in the vertical direction, and the second welded nut 172b is arranged coaxially with the second bolt hole 172a. The protector 6 is fixed to the bracket 1 by two bolts that are screwed through bolt holes 171a and 172a into weld nuts 171b and 172b. The lower ends of the bolts screwed into each weld nut 171b and 172b are positioned above the upper surface of the rear floor panel 21 with a gap between them. The lower horizontal section 13 and the upper horizontal section 15 are parallel to each other, and the central axes of the first weld nut 171b and the second weld nut 172b are parallel to each other. Therefore, the axial forces of the two bolts passing through the two weld nuts 171b and 172b are parallel to each other.

[0025] A bead 18a is formed at the connection portion 18 between the downward-sloping portion 11 and the lower horizontal portion 13, recessing downwards and extending from the downward-sloping portion 11 side toward the lower horizontal portion 13 side. In a side view from one side in the vehicle's front-rear direction, the connection portion 18 has a curved shape that smoothly connects the lower end of the downward-sloping portion 11 and the end of the lower horizontal portion 13 on the downward-sloping portion 11 side. In the illustrated example, the lower horizontal portion 13 is positioned offset outward and upward in the vehicle width direction relative to the lower end of the downward-sloping portion 11, and the connection portion 18 is curved in a roughly S-shape. The bead 18a is formed in the center of the connection portion 18 in the width direction and extends in the vehicle width direction to a position beyond the end of the lower horizontal portion 13 on the downward-sloping portion 11 side in a plan view from above the vehicle. In the illustrated example, the bead 18a is recessed downwards, but it may instead bulge upwards.

[0026] The bracket 1, installed on the upper surface of the floor panel 2, may be subjected to loads from above during vehicle production and use, for example, by being stepped on by workers or occupants. In the case of the bracket 1 of this embodiment, which is located below the rear seat, it may be stepped on by workers working on the floor panel 2 before the rear seat is assembled to the floor panel 2 during vehicle production. In particular, in the case of the bracket 1 attached to the floor inclined section 21c, the lower horizontal section 13, which is located above the horizontal floor side section 21b (horizontal floor section), is easily stepped on by workers. Also, when the protector 6 attached to the bracket 1 is stepped on, a load from above acts on the lower horizontal section 13 to which the protector 6 is fixed.

[0027] According to this embodiment, a bead 18a extending from the downward inclined portion 11 to the downward horizontal portion 13 is formed at the connection portion 18 between the downward inclined portion 11 and the downward horizontal portion 13, thereby increasing the bending rigidity of the connection portion 18 and its surrounding area, particularly in the vertical direction. This ensures that the bracket 1 has sufficient rigidity to withstand loads from above during vehicle production and use, and suppresses deformation of the bracket 1.

[0028] Thus, according to this embodiment, in a structure in which a part of the bracket 1 attached to the floor inclined portion 21c is positioned above the floor side portion 21b (horizontal portion of the floor), deformation of the bracket 1 during vehicle production and use can be suppressed.

[0029] Furthermore, according to this embodiment, the first protector fixing portion 171 and the second protector fixing portion 172 are provided on the lower horizontal portion 13 and the upper horizontal portion 15, respectively, which are parallel to each other, and the axial forces of the two bolts that fix the protector 6 to the bracket 1 are parallel to each other. This makes it possible to suppress twisting of the protector 6 fixed by the two bolts.

[0030] Furthermore, according to this embodiment, the bracket 1 has a harness support portion 16 and protector fixing portions 171, 172, and is configured so that both the connectors 31a, 32a and the protector 6 can be attached to a single bracket 1. With this structure, the connectors 31a, 32a and the protector 6 can be precisely aligned, and the installation space required for the bracket 1, connectors 31a, 32a and protector 6 can be reduced. In addition, this space-saving design allows the bracket 1 and protector 6 to be installed in the limited space below the slide rail without requiring any redesign of the surrounding structure such as the rear floor panel 21.

[0031] Furthermore, according to this embodiment, the connectors 31a and 32a supported by the harness support portion 16 provided on the vertical portion 14 are positioned below the upper horizontal portion 15. This prevents the connectors 31a and 32a from being stepped on by workers and protects them. In addition, interference between the connectors 31a and 32a and the carpet 5 covering the bracket 1 is suppressed, thereby reducing the impact on the appearance of the carpet 5, such as deformation (e.g., bulging) caused by the connectors 31a and 32a.

[0032] Next, the configuration of each part of the vehicle understructure 10 will be described in detail with further reference to Figures 5 to 7. Figure 5 is a cross-sectional view along line AA in Figure 4. Figure 6 is a side view of the upper corner formed by the vertical part 14 and the upper horizontal part 15, and the upper reinforcing part 191 provided thereon, as seen from the front of the vehicle. Figure 7 is a side view of the intermediate corner formed by the downward sloping part 11 and the vertical part 14, and the intermediate reinforcing part 192 provided thereon, as seen from the front of the vehicle.

[0033] As shown in Figures 4 and 5, in this embodiment, the lower horizontal section 13 has a flange portion 13a projecting downward from its edge. The flange portion 13a extends along the edge of the horizontal wall of the lower horizontal section 13, which extends in the vehicle width direction and the vehicle longitudinal direction and faces upward, and projects downward from the lower surface of the horizontal wall. In the illustrated example, the edge of the lower horizontal section 13 opposite to the downward inclined section 11 is convex in the outward direction in the vehicle width direction, and the flange portion 13a extends continuously over approximately the entire length of this edge. With such a structure, the rigidity of the lower horizontal section 13, especially in the vertical direction, is increased by the flange portion 13a, so that the deformation of the bracket 1 when stepped on can be suppressed even more reliably.

[0034] As shown in Figures 2 to 4, in this embodiment, the downward inclined portion 11 is welded to both the rear floor panel 21 and the rear side member 4, which constitutes part of the vehicle frame. In Figure 4, P indicates a welding point. Specifically, the rear side member 4 has a hat-shaped cross-section that is convex downwards and extends in the longitudinal direction of the vehicle, and has a pair of flange portions 4a that are spaced apart from each other in the vehicle width direction. The flange portion 4a on the inside in the vehicle width direction is positioned adjacent to the underside of the floor inclined portion 21c, and the downward inclined portion 11, the floor inclined portion 21c, and the flange portion 4a are welded to each other overlapping in the thickness direction of the floor inclined portion 21c. In addition, the upward inclined portion 12 and the floor inclined portion 21c are welded to each other overlapping in the thickness direction of the floor inclined portion 21c.

[0035] In the illustrated example, the downward-sloping portion 11 has three welding areas 11a arranged in its width direction (vehicle longitudinal direction). The downward-sloping portion 11 has three recesses that are indented downwards, and the flat bottom of each recess forms a welding area 11a. The two welding areas 11a on the front and rear sides of the vehicle are spot-welded to the floor slope 21c and flange portion 4a, and the middle welding area 11a is spot-welded to the floor slope 21c. The middle welding area 11a may also be spot-welded to the floor slope 21c and flange portion 4a. The upward-sloping portion 12 is configured similarly to the welding areas 11a and has one welding area 12a that is spot-welded to the floor slope 21c.

[0036] As described above, according to this embodiment, the downward-sloping portion 11 is joined to the rear floor panel 21 and the rear side member 4, which is a vehicle body frame positioned adjacent to the lower side of the rear floor panel 21. This increases the rigidity of the downward-sloping portion 11 and the adjacent connecting portion 18, thereby more reliably suppressing the deformation of the bracket 1 when stepped on. Furthermore, by joining the inclined portions 11 and 12 to the rear floor panel 21 by welding, the bracket 1 can be fixed to the rear floor panel 21 without requiring any additional processing of the rear floor panel 21 for joining the inclined portions 11 and 12.

[0037] As shown in Figures 4, 6, and 7, in this embodiment, the bracket 1 has an upper reinforcing portion 191 and an intermediate reinforcing portion 192 as structures for increasing the rigidity of the portion of the bracket 1 that is positioned on the floor inclined portion 21c.

[0038] The upper reinforcing portion 191 is provided at the upper corner formed by the vertical portion 14 and the upper horizontal portion 15, and is connected to the vertical portion 14 and the upper horizontal portion 15. As shown in Figure 6, the upper corner is a roughly right-angled corner (corner) in a plan view from one side in the longitudinal direction of the vehicle, and extends in the longitudinal direction of the vehicle. In the illustrated example, triangular rib-shaped upper reinforcing portions 191 are provided at the front end and rear end of the upper corner, with one side of the upper reinforcing portion 191 connected to the vertical portion 14 and the other side connected to the upper horizontal portion 15.

[0039] The intermediate reinforcement portion 192 is provided at the intermediate corner formed by the downward sloping portion 11 and the vertical portion 14, and is connected to the downward sloping portion 11 and the vertical portion 14. As shown in Figure 7, the intermediate corner is an obtuse angle corner (corner) in a plan view from one side in the longitudinal direction of the vehicle, and extends in the longitudinal direction of the vehicle. In the illustrated example, triangular rib-shaped intermediate reinforcement portions 192 are arranged at the front end and rear end of the intermediate corner, with one side of the intermediate reinforcement portion 192 connected to the downward sloping portion 11 and the other side of the intermediate reinforcement portion 192 connected to the vertical portion 14.

[0040] As described above, the provision of the upper reinforcing portion 191 and the intermediate reinforcing portion 192 increases the rigidity of the bracket 1 in the vertical direction, particularly the rigidity of the bracket 1 against loads acting from above on the upper horizontal portion 15 and the vertical portion 14. Therefore, even if the upper horizontal portion 15 is stepped on by a worker, for example, deformation of the bracket 1, especially the portions (11, 14, 15) positioned on the floor inclined portion 21c, can be suppressed.

[0041] Furthermore, the presence of the upper reinforcement portion 191 and the intermediate reinforcement portion 192 increases the rigidity of the parts of the bracket 1 (11, 14, 15) located on the floor inclined portion 21c in the vehicle width direction (horizontal direction), thereby suppressing deformation of the bracket 1 due to loads in the vehicle width direction. For example, during factory work, a worker may kick the bracket 1 (e.g., the vertical portion 14) with their foot from the outside in the vehicle width direction, potentially applying a load in the vehicle width direction to the bracket 1. Also, depending on the structure of the vehicle body, the outer side of the bracket 1 in the vehicle width direction may not be covered by parts such as the quarter trim, making it easy to access the carpet 5 covering the bracket 1 through the rear door opening 101. In such a structure, when the vehicle is in use, the occupant's feet or luggage such as an umbrella may hit the carpet 5 from the outside in the vehicle width direction, potentially applying a load in the vehicle width direction to the bracket 1 (e.g., the lower inclined portion 11 or the vertical portion 14) via the carpet 5. This ensures that the bracket 1 has sufficient rigidity to withstand such loads in the vehicle width direction.

[0042] It is preferable that the bracket 1 has both the upper reinforcing portion 191 and the intermediate reinforcing portion 192, but it may also have only the upper reinforcing portion 191 of the reinforcing portions 191 and 192.

[0043] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and further modifications and changes are possible based on the technical concept of the present invention.

[0044] For example, in the above-described embodiment, the lower horizontal portion 13 is positioned offset outward and upward in the vehicle width direction from the lower end of the lower inclined portion 11, and the lower end of the lower inclined portion 11 and the end of the lower horizontal portion 13 on the lower inclined portion 11 side are connected by a substantially S-shaped connecting portion 18. However, the shape of the connecting portion 18 between the lower inclined portion 11 and the lower horizontal portion 13 is not limited to this. For example, the lower horizontal portion 13 may extend outward in the vehicle width direction in a continuous manner with respect to the lower end of the lower inclined portion 11, in which case the corner formed by the lower inclined portion 11 and the lower horizontal portion 13 becomes the connecting portion 18.

[0045] In the above-described embodiment, the bracket 1 is fixed to the floor panel 2 by welding the inclined portions 11 and 12 to the floor panel 2, but the method of fixing the bracket 1 to the floor panel 2 is not limited to this. For example, the inclined portions 11 and 12 may be joined to the floor panel 2 (and the vehicle frame) by a joining method other than welding (for example, bolts).

[0046] In the embodiment described above, the harness support portion 16 is provided on the vertical portion 14, but the harness support portion 16 may also be provided on other parts of the bracket 1 (for example, the downward inclined portion 11). Depending on the part on which the harness support portion 16 is provided, the specific form of the harness support portion 16 can be appropriately changed.

[0047] In the above-described embodiment, triangular rib-shaped upper reinforcing portions 191 are provided at the front and rear ends of the upper corner, and triangular rib-shaped intermediate reinforcing portions 192 are provided at the front and rear ends of the intermediate corner, but the shape and arrangement of the reinforcing portions 191 and 192 are not limited to this. For example, the upper reinforcing portion 191 may be provided at the center of the upper corner in the vehicle's longitudinal direction, and may take a form other than a triangular rib. Similarly, for example, the intermediate reinforcing portion 192 may be provided at the center of the intermediate corner in the vehicle's longitudinal direction, and may take a form other than a triangular rib.

[0048] In the above-described embodiment, the first protector fixing portion 171 and the second protector fixing portion 172 are configured such that the protector 6 is fixed by bolts, but they may also be configured such that the protector 6 is fixed by other means (e.g., welding).

[0049] In the embodiment described above, the bracket 1 is attached to the right floor inclined portion 21c of the rear floor panel 21. However, the location where the bracket 1 is attached is not limited to this, and the bracket 1 may be attached to other floor inclined portions of the floor panel 2 that are inclined in the horizontal direction (specifically, in the vehicle width direction or the vehicle longitudinal direction).

[0050] In the embodiment described above, the bracket 1 supports connectors 31a and 32a of the wire harness 3, but the position of support of the wire harness 3 by the bracket 1 is not limited to this, and the bracket 1 may support other parts of the wire harness 3. Furthermore, the wire harness 3 supported by the bracket 1 is not limited to the wire harness for the EPB, but may be other types of wire harnesses routed on and fixed to the floor panel 2. [Explanation of symbols]

[0051] 1 Bracket 11 Downward slope (slope) 11a Welding area 12 Upper inclined section 12a Welding area 13 Lower horizontal part 13a Flange section 14 Vertical section 15 Upper horizontal section 16 Harness support section 171 First protector fixing part (protector fixing part) 171a First bolt hole 171b First welding nut 172 Second protector fixing part 172a Second bolt hole 172b Second welding nut 18 Connection part 18a Bead 191 Upper reinforcement section 192 Intermediate reinforcement section 2 floor panels 21 Rear floor panel 21a Center of the floor 21b Floor side (horizontal part of the floor) 21c Floor inclined section 3 Wire Harness 31. First wire harness 31a connector 31b Locked part 32. Second wire harness 32a connector 4. Rear side member (vehicle frame) 5 Carpet 6 Protectors 10. Vehicle understructure P welding point

Claims

1. It is equipped with a bracket that is fixed to the floor panel located at the bottom of the vehicle and supports the wire harness, The floor panel is a vehicle understructure having a floor inclined portion that is inclined with respect to the horizontal direction and a floor horizontal portion that extends in the horizontal direction from the lower end of the floor inclined portion, The aforementioned bracket is A harness support portion that supports the aforementioned wire harness, An inclined portion arranged on the upper surface of the aforementioned floor inclined portion, It has a lower horizontal section connected to the lower end of the inclined section and extending horizontally above the horizontal floor section, A vehicle understructure characterized in that a bead extending from the inclined portion side toward the downward horizontal portion side is formed at the connection portion between the inclined portion and the downward horizontal portion.

2. The vehicle understructure according to claim 1, characterized in that the lower horizontal portion has a flange portion projecting downward at its edge.

3. The vehicle body frame is positioned adjacent to the lower side of the aforementioned floor inclined section. The vehicle understructure according to claim 1, characterized in that the inclined portion is joined to the floor inclined portion and the vehicle body frame.

4. The aforementioned bracket is A vertical portion extending upward from the upper end of the inclined portion, An upper horizontal portion extending horizontally from the upper end of the vertical portion toward the opposite side of the inclined portion, The vehicle understructure according to claim 1, characterized in that it has an upper reinforcing portion provided at the upper corner formed by the vertical portion and the upper horizontal portion, and connected to the vertical portion and the upper horizontal portion.

5. The vehicle understructure according to claim 4, characterized in that the bracket is provided at an intermediate corner formed by the inclined portion and the vertical portion, and has an intermediate reinforcing portion connected to the inclined portion and the vertical portion.

6. The vehicle understructure according to claim 4 or 5, characterized in that the harness support portion is provided in the vertical portion.

7. The vehicle understructure according to claim 1, characterized in that the lower horizontal portion has a protector fixing portion to which a protector that covers the bracket and the wire harness from above is fixed.

Images