Vehicle body device protection structure

Abstract

To provide a device protective structure for a vehicle body that has a simple constitution, and can guide a sub-frame, moving back when a vehicle has a front collision, downward more stably and also effectively protect a device of a protection object such as a high-voltage unit.SOLUTION: A device protective structure for a vehicle body has: a slider member (30) which covers at least a front part of a device (40) of a protection object arranged under a floor of a vehicle body (1) behind a sub-frame (20); and an attachment member (50) which is arranged behind a rear end part (22) of the sub-frame (20), and attaches the slider member (30) to the vehicle body (1), wherein the slider member (30) has an inclined surface (31a) which faces the front of the vehicle body (1) and tilts downward to behind the vehicle body (1), and the attachment member (50) has a reinforcement surface (51) which is formed at the same tilt angle with the inclined surface (31a), and abuts on the inclined surface (31a) from behind.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vehicle body device protection structure for protecting devices mounted on a vehicle in the event of a vehicle collision. [Background technology]

[0002] BACKGROUND ART Patent Document 1, for example, describes a device protection structure for protecting devices mounted on a vehicle in the event of a vehicle collision.

[0003] The vehicle described in Patent Document 1 has a subframe installed under a front body member, and a high-voltage battery, which is a device to be protected, mounted under the center floor located rearward of the subframe. A reinforcing structure for protecting the high-voltage battery in the event of a frontal collision is located rearward of the subframe and forward of the high-voltage battery. The front surface of this reinforcing structure is an inclined surface that slopes rearward. This inclined surface guides downward movement of the subframe in the event of a vehicle collision, thereby preventing the subframe from directly colliding with the front portion of the high-voltage battery. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-132132 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the conventional structure described in Patent Document 1, the inclined surface of the reinforcing structure for guiding the subframe downward is simply a partial surface of the reinforcing structure with a hollow closed cross-section that is inclined rearward, which does not provide sufficient strength against a subframe collision. As a result, the inclined surface is deformed by a subframe collision, making it impossible to guide the subframe downward, which may lead to damage to the high-voltage battery.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to provide an equipment protection structure for a vehicle body that has a simple configuration, can more stably guide a subframe downward, and can effectively protect the equipment to be protected. [Means for solving the problem]

[0007] In order to solve the above problems, the vehicle body device protection structure of the present invention is a vehicle body device protection structure having side frames (10) extending in the fore-and-aft direction of the vehicle body (1) on the sides of the engine compartment (A), subframes (20) attached below the side frames (10) and supporting suspension parts, and a device (40) to be protected that is arranged under the floor of the vehicle body (1) behind the subframe (20), and is characterized in that it comprises a slider member (30) covering at least a front portion of the device to be protected (40), and an attachment member (50) that is arranged behind the rear end portion (22) of the subframe (20) and attaches the slider member (30) to the vehicle body (1), wherein the slider member (30) has an inclined surface (31 a) that faces the front of the vehicle body (1) and is inclined rearward and downward of the vehicle body (1), and the attachment member (50) has a reinforcing surface (51) that is formed at the same inclination angle as the inclined surface (31 a) and abuts the inclined surface (31 a) from behind.

[0008] According to the vehicle body device protection structure of the present invention, when a vehicle has a frontal collision, the rear end of the subframe, which moves rearward, contacts the inclined surface of the slider member, thereby guiding the subframe downward along the inclined surface of the slider member. This prevents the subframe from coming into contact with the protected device, thereby preventing damage to the protected device. In particular, because the inclined surface of the slider member is reinforced by the reinforcing surface of the mounting member that contacts the inclined surface from the rear, deformation or displacement of the inclined surface due to contact (collision) of the subframe can be effectively prevented. Therefore, the subframe can be guided downward more stably, thereby more reliably protecting the protected device.

[0009] In addition, in this device protection structure, the rear end portion (22) of the subframe (20) is a left and right extension portion that extends rearward beyond the center portion on both sides in the vehicle width direction, and the slider member (30) has side walls (31A) that incline rearward and downward from the vehicle body (1) on both sides in the vehicle width direction, a center wall (31B) that protrudes downward beyond the side walls (31A) at the center in the vehicle width direction, and a vertical wall (32) that connects the step portions between the side walls (31A) and the center wall (31B) in the vehicle width direction, and the underside of the side wall (31A) is an inclined surface (31a), and a cable (45) that extends from the device (40) to be protected toward the engine room (A) through the center portion in the vehicle width direction may be arranged between the floor portion of the vehicle body (1) and the center wall (31B).

[0010] According to this configuration, the slider member has a central wall that protrudes downward beyond the side walls, thereby forming a cable routing space for routing cables between the vehicle body floor and the central wall, and the cables routed in this cable routing space can be protected by the central wall and vertical walls, effectively preventing the subframe, which moves backward in the event of a vehicle collision, from coming into contact with the cables. Furthermore, by disposing the side walls in the slider member behind the left and right extensions of the subframe and reinforcing these side walls with mounting members, the subframe can be guided downward before the cable routing space formed by the central wall is crushed. Furthermore, because the step portions between the side walls and the central wall are connected by vertical walls, the subframe can be reliably guided downward by the vertical walls of the step portions even when the subframe tilts backward to the left or right, thereby more reliably preventing the subframe from entering the cable routing space.

[0011] In this device protection structure, the slider member (30) may have a bottom protection portion (34) extending rearward from the lower end portion (33) of the inclined surface (31a) of the vehicle body (1).

[0012] According to this configuration, the slider member has a bottom protection portion that extends from the lower end of the inclined surface toward the rear of the vehicle, so that the subframe guided downward along the inclined surface can be prevented from coming into contact with the device being protected even if it moves further rearward past the position of the lower end of the inclined surface.

[0013] In this device protection structure, the lower end portion (33) of the inclined surface (31a) of the slider member (30) may extend below the lower end portion (43) of the device (40) to be protected.

[0014] With this configuration, the lower end of the inclined surface of the slider member extends below the lower end of the device to be protected, so that the subframe, which moves backward in the event of a vehicle collision, can be guided below the lower end of the device to be protected, thereby more reliably preventing the subframe from coming into contact with the device to be protected.

[0015] In addition, in this device protection structure, the upper end (51a) of the reinforcing surface (51) may be located higher than the upper surface (22a) of the rear end (22) of the subframe (20), and the lower end (51b) of the reinforcing surface (51) may be located lower than the lower surface (22b) of the rear end (22) of the subframe (20).

[0016] With this configuration, the upper end of the reinforcing surface of the mounting member is located above the upper surface of the rear end of the subframe, and the lower end is located below the lower surface of the rear end of the subframe, so that the rear end of the subframe moving rearward abuts against the mounting member (the portion of the inclined surface reinforced by the mounting member) without passing by each other, and the load from the subframe moving rearward can be reliably received by the mounting member. Therefore, deformation of the inclined surface of the slider member can be more reliably suppressed, and the subframe moving rearward can be stably guided downward.

[0017] In this equipment protection structure, the mounting member (50) may be a solid member.

[0018] With this configuration, since the mounting member is a solid member, the mounting member can more firmly reinforce the inclined surface of the slider member, effectively preventing deformation or displacement of the inclined surface of the slider member when subjected to load from the subframe.

[0019] In addition, this device protection structure may include a floor frame (12) having a closed cross section (12b) and extending in the fore-and-aft direction of the vehicle, and the mounting member (50) may be attached to the vehicle body (1) via the floor frame (12).

[0020] With this configuration, the mounting member is attached to the vehicle body via the floor frame, which is a high-strength framework member that forms a closed cross section, so that it is possible to effectively prevent the mounting member attached to the vehicle body from coming loose or the mounting point from being damaged by the load generated when the subframe, which moves backward, abuts the inclined surface of the slider member during a frontal collision of the vehicle. In addition, because the floor frame, which extends in the fore-and-aft direction of the vehicle, can distribute the load over a wide area, it is possible to more firmly receive the load of the moving backward subframe and guide the subframe downward.

[0021] In addition, in this device protection structure, the device to be protected is a high-voltage unit (40) mounted on a vehicle, and the cable (45) may be a power cable connecting the high-voltage unit (40) to a power source in the engine room (A).

[0022] According to this configuration, the device to be protected is a high-voltage unit mounted on the vehicle, so that the high-voltage unit can be placed under the floor of the vehicle body to optimize the layout, while reliably preventing the subframe, which moves back in the event of a frontal collision of the vehicle, from coming into contact with the high-voltage unit or power cables, thereby improving the safety of the vehicle.

[0023] The reference numerals in parentheses above indicate, for reference, the drawing reference numbers of corresponding components in the embodiments described below. [Effects of the Invention]

[0024] The vehicle body device protection structure of the present invention has a simple configuration that can more stably guide the subframe, which retreats during a frontal collision of the vehicle, downward, thereby enabling effective protection of the device to be protected, such as a high-voltage unit. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a schematic perspective view of a vehicle body provided with a device protection structure according to an embodiment of the present invention, as viewed from below. [Figure 2]1 is a schematic side view of a vehicle body equipped with a device protection structure according to one embodiment of the present invention. [Figure 3] FIG. 2 is a partial enlarged view of the X portion of FIG. [Figure 4] FIG. 3 is a partial enlarged view of a portion Y in FIG. 2. [Figure 5] FIG. [Figure 6] FIG. 10 is a diagram showing the mounting member attached to the vehicle body, as viewed from the underside of the vehicle body. [Figure 7] FIG. 7 is a schematic view showing a cross section taken along the arrow ZZ in FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the terms "forward" and "rearward" refer to the forward and backward directions (orientations) of a vehicle body (vehicle) described below. Furthermore, the terms "up," "down," "left," and "right" refer to the up, down, left, and right directions (orientations) of the vehicle body (vehicle) when facing the forward direction (front side).

[0027] Figures 1 and 2 are schematic diagrams showing a vehicle body equipped with an equipment protection structure according to one embodiment of the present invention, with Figure 1 being a perspective view of the vehicle body seen from below and Figure 2 being a side view of the vehicle body seen from the side. The vehicle body 1 shown in these figures includes front side frames (side frames) 10 that extend in the fore-and-aft direction of the vehicle body 1 on the sides of an engine compartment A provided at the front of the vehicle, and subframes 20 that are attached below the front side frames 10 and support suspension components (not shown).

[0028] A base frame 11 is provided on the rear side of the front side frame 10. The base frame 11 includes a pair of left and right floor frames 12 that are connected to the rear sides of the front side frames 10 and extend in the front-to-rear direction, and a pair of left and right side sills 14 that are located outward in the vehicle width direction from the left and right floor frames 12 (specifically, at the outer ends of the base frame 11 in the vehicle width direction) and extend in the front-to-rear direction.

[0029] The subframe 20 is formed in a grid shape overall and includes a pair of left and right side members 21, 21 extending in the front-to-rear direction, and a cross member 24 extending in the vehicle width direction and connecting the front edge portions and the rear edge portions of the side members 21, 21. The rear end sides of the pair of left and right side members 21, 21 form extending portions 22, 22 that extend rearward from a center portion of the subframe 20 in the vehicle width direction. In other words, the rear end of the subframe 20 has extending portions 22, 22 on both sides (left and right sides) in the vehicle width direction, respectively, that extend rearward, and the insides of the extending portions 22, 22 (inside in the vehicle width direction) are formed in a concave shape that is recessed forward.

[0030] Additionally, a high-voltage unit (high-voltage control equipment unit) 40, which is the device to be protected, is installed under the floor of the vehicle body 1 (under the floor of the passenger compartment) behind the subframe 20. Although not shown in detail, the high-voltage unit 40 is a unit that includes a battery module mounted on the vehicle, a high-voltage device and power distribution components for controlling the power transfer between the battery module and the battery module, a main switch for the battery module, and the like. A cover member 46 that covers the underside of the high-voltage unit 40 is attached to the underside of the rear side excluding the front portion of the high-voltage unit 40. The cover member 46 is a substantially flat-plate-shaped member made of synthetic resin.

[0031] FIG. 3 is a partial enlarged view of portion X in FIG. 1. FIG. 4 is a partial enlarged view of portion Y in FIG. 2. As shown in these figures, a slider plate (slider member) 30 is provided to cover the front portion of the high-voltage unit 40. The slider plate 30 is a metal plate-shaped member arranged to cover the front and lower sides of the front end of the high-voltage unit 40. The slider plate 30 includes inclined walls 31 (31A, 31B) that slope downward and toward the rear of the vehicle body 1. The inclined walls 31 of the slider plate 30 include a pair of side inclined walls (side walls) 31A formed behind the pair of extension portions 22, 22 of the subframe 20, respectively, and a central inclined wall (central wall) 31B formed at the center in the vehicle width direction and protruding downward (toward the vehicle exterior) from the side inclined walls 31A. Because the side inclined walls 31A have a steeper inclination angle than the central inclined wall 31B, the central inclined wall 31B is positioned lower (lower) than the side inclined walls 31A. The step portions between both sides of the central inclined wall 31B and the insides of the left and right side inclined walls 31A in the vehicle width direction are connected by vertical walls 32 extending in the up-down direction. That is, the central inclined wall 31B and the side inclined walls 31A in the vehicle width direction are connected via a step. As will be described later, the lower surfaces of the side inclined walls 31A form inclined surfaces 31a that abut against the pair of extension portions 22, 22 of the subframe 20 when it is moving backward.

[0032] The slider plate 30 is attached to the vehicle body 1 by a pair of attachment members 50, 50. FIG. 5 is a diagram showing the attachment member 50. As shown in the figure, the attachment member 50 is a solid member having a substantially triangular cross section, and includes a lower attachment surface (reinforcing surface) 51 that is attached to the slider plate 30, and an upper attachment surface 52 that is attached to the vehicle body 1 via a floor frame 12, which will be described later. As shown in FIG. 4, the lower attachment surface 51 is formed at the same inclination angle as the side inclined wall 31A. This lower attachment surface 51 abuts against the back surface (rear) of the side inclined wall 31A, thereby serving as a reinforcing surface that reinforces the side inclined wall 31A from the back surface (rear).

[0033] 3, a support member 47 that supports the high-voltage unit 40 is also attached to the mounting member 50. Although detailed illustration is omitted, the support member 47 is a frame-shaped member that supports the high-voltage unit 40 in a suspended manner, and this support member 47 is attached to the vehicle body 1 side via only the mounting member 50. In other words, the high-voltage unit 40 is attached to the vehicle body 1 via this support member 47 and the mounting member 50.

[0034] 3, a high-voltage cable (cable) 45 is provided that extends from the high-voltage unit 40 through the center in the vehicle width direction toward the engine compartment A. This high-voltage cable 45 is arranged in a space (cable arrangement space) B formed between the central inclined wall 31B of the slider plate 30 and the floor of the vehicle body 1.

[0035] As shown in FIG. 4 , the lower ends (rear ends) 33 of the side inclined walls 31A and the central inclined wall 31B of the slider plate 30 extend below the lower end (lower surface) 43 of the high-voltage unit 40. As a result, the lower ends 33 of the side inclined walls 31A and the central inclined wall 31B are located lower than the lower end 43 of the high-voltage unit 40. The slider plate 30 also has a bottom protective wall (bottom protective portion) 34 that extends from the lower ends 33 of the side inclined walls 31A and the central inclined wall 31B toward the rear of the vehicle body 1 (substantially parallel to the base frame 11). Because the lower ends 33 of the side inclined walls 31A and the central inclined wall 31B are located lower than the lower end 43 of the high-voltage unit 40, the bottom protective wall 34 is an eave-shaped portion that extends toward the rear of the vehicle body 1 at a position lower than the lower end 43 of the high-voltage unit 40. Therefore, a gap D is formed in the vertical direction between the lower end portions 33 and bottom protection wall of the side inclined walls 31A and central inclined wall 31B and the lower end portion 43 of the high-voltage unit .

[0036] Also, as shown in Figure 4, the upper end (front end) 51a of the reinforcing surface 51 of the mounting member 50 is located above the upper surface 22a of the extension portion 22 of the subframe 20, and the lower end (rear end) 51b of the reinforcing surface 51 of the mounting member 50 is located below the lower surface 22b of the extension portion 22 of the subframe 20.

[0037] FIG. 6 is a diagram showing the mounting member attached to the vehicle body, as viewed from the underside of the vehicle body. FIG. 7 is a schematic diagram showing a cross section taken along the line ZZ in FIG. 6. Note that the slider plate 30 attached to the mounting member 50 is not shown in FIG. 6. The high-voltage unit 40 and cover member 46 are also not shown. As shown in these figures, the mounting member 50 is attached to the vehicle body 1 via a floor frame 12. The floor frame 12 is an elongated member having a structure with a substantially rectangular closed cross section 12b and extending in the fore-and-aft direction of the vehicle body 1. The entire longitudinal length of the floor frame 12 is attached to and supported under the floor of the vehicle body 1. The mounting member 50 is fixed to the underside of the floor frame 12 near the front end 12a by fastening bolts (fasteners) 55.

[0038] As described above, the vehicle body 1 of this embodiment includes side frames 10 extending in the front-rear direction on the sides of the engine compartment A, subframes 20 attached below the side frames 10 to support suspension components, and high-voltage unit (device to be protected) 40 arranged under the floor of the vehicle body 1 behind the subframe 20. As a protective structure for protecting the high-voltage unit 40 in the event of a vehicle collision, the vehicle body 1 includes a slider plate (slider member) 30 that covers the front portion of the high-voltage unit 40 and has an inclined surface 31a that slopes rearward and downward from the vehicle body 1, and a mounting member 50 that mounts the slider plate 30 to the vehicle body 1, and the mounting member 50 has a reinforcing surface 51 that is formed at the same inclination angle as the side inclined wall 31A (inclined surface 31a) of the slider plate 30 and abuts against the back side (rear) of the side inclined wall 31A.

[0039] According to the device protection structure for a vehicle body 1 of the present invention, when the vehicle experiences a frontal collision, the extension (rear end) 22 of the subframe 20, which moves rearward (reverses), abuts against the side inclined wall 31A (inclined surface 31a) of the slider plate 30, thereby guiding the retracting subframe 20 downward along the side inclined wall 31A of the slider plate 30. This prevents the subframe 20 from coming into contact with the high-voltage unit 40, which is the device to be protected, and prevents damage to the high-voltage unit 40. In particular, since the side inclined wall 31A is reinforced by the reinforcing surface 51 of the mounting member 50 abutting against the side inclined wall 31A (inclined surface 31a) of the slider plate 30 from its rear side (rear), deformation or displacement of the side inclined wall 31A (inclined surface 31a) due to contact (collision) of the subframe 20 can be effectively prevented. Therefore, the subframe 20 can be stably guided downward, thereby more reliably protecting the high-voltage unit 40.

[0040] In this embodiment, the rear end of the subframe 20 is formed by left and right extensions 22 that extend rearward beyond the center of the subframe 20 on both sides in the vehicle width direction, and the slider plate 30 includes side inclined walls (side walls) 31A that incline rearward and downward from the vehicle body 1 on both sides in the vehicle width direction, a central inclined wall (central wall) 31B that protrudes downward from the side inclined walls 31A at the center in the vehicle width direction, and a vertical wall 32 that connects the stepped portions between the side inclined walls 31A and the central inclined walls 31B in the vehicle width direction, and the lower surface (surface) of the side inclined wall 31A forms an inclined surface that receives the subframe 20 as it moves backward. In addition, a high-voltage cable 45 that extends from the high-voltage unit 40 toward the engine room A through the center of the vehicle width direction is arranged in a cable arrangement space B formed between the floor of the vehicle body 1 and the central inclined wall 31B.

[0041] According to this configuration, the slider plate 30 has the central inclined wall 31B that protrudes downward beyond the side inclined walls 31A, so that a cable arrangement space B for arranging cables can be formed between the floor of the vehicle body 1 and the central inclined wall 31B (in the vertical gap), and the central inclined wall 31B can protect the high-voltage cables 45 arranged in this cable arrangement space B from the subframe 20, which moves backward in the event of a vehicle collision. Furthermore, in the slider plate 30, the side inclined walls 31A having inclined surfaces 31a are arranged behind the left and right extension portions 22 that are the rear end portions of the subframe 20, and the side inclined walls 31A are reinforced with the reinforcing surfaces 51 of the mounting members 50, so that the subframe 20 can be guided downward before the cable arrangement space B formed by the central inclined wall 31B is crushed. Furthermore, since the step portion between the side inclined wall 31A and the central inclined wall 31B is connected by the vertical wall 32, even if the subframe 20 tilts left or right and moves backward, the vertical wall 32 of the step portion can reliably guide the subframe 20 downward, preventing the subframe 20 (extension portion 22) from entering the cable arrangement space B.

[0042] In this embodiment, the slider plate 30 has a bottom protection wall (bottom protection portion) 34 that extends rearward from the lower end 33 of the inclined surface 31a.

[0043] With this configuration, even when the subframe 20 guided downward along the inclined surface 31a moves further rearward past the position of the lower end 33 of the inclined surface 31a, it can be prevented from coming into contact with the high-voltage unit 40. Therefore, the high-voltage unit 40 can be protected more effectively.

[0044] In this embodiment, the lower end 33 of the inclined surface 31 a of the slider plate 30 extends to a position lower than the lower end 43 of the high-voltage unit 40 .

[0045] According to this configuration, the subframe 20, which moves backward in the event of a vehicle collision, can be guided to a position lower than the lower end portion 43 of the high-voltage unit 40. Therefore, the subframe 20, which moves backward, can be more reliably prevented from coming into contact with the high-voltage unit 40.

[0046] In addition, in this embodiment, the upper end 51a of the reinforcing surface 51 of the mounting member 50 is located above the upper surface 22a of the extension portion 22 of the subframe 20, and the lower end 51b of the reinforcing surface 51 is located below the lower surface 22b of the extension portion 22 of the subframe 20.

[0047] According to this configuration, extension portion 22 of subframe 20 moving rearward comes into contact with reinforcing surface 51 of mounting member 50 (portion reinforced by reinforcing surface 51 on inclined surface 31a of slider plate 30) without passing by said reinforcing surface 51, so that the load from subframe 20 moving rearward can be reliably received by mounting member 50. Therefore, deformation of inclined surface 31a of slider plate 30 can be more reliably suppressed, and subframe 20 moving rearward can be stably guided downward.

[0048] In this embodiment, the mounting member 50 is a solid member.

[0049] According to this configuration, since the mounting member 50 is a solid member, the mounting member 50 can more firmly reinforce the inclined surface 31a of the slider plate 30, effectively preventing deformation or displacement of the inclined surface 31a of the slider plate 30 when it receives a load from the subframe 20.

[0050] In this embodiment, the vehicle body 1 includes a floor frame 12 having a closed cross section 12b and extending in the front-rear direction of the vehicle body 1. The mounting member 50 is attached to the vehicle body 1 via the floor frame 12.

[0051] This configuration effectively prevents the mounting member 50 attached to the vehicle body 1 from coming off or the mounting location from being damaged due to the load generated when the rearward-moving subframe 20 abuts against the inclined surface 31a of the slider plate 30 during a frontal collision of the vehicle. In addition, the load can be distributed over a wide range by the floor frame 12 extending in the front-to-rear direction, so that the load of the rearward-moving subframe 20 can be more firmly received and the subframe 20 can be guided downward.

[0052] Furthermore, in the vehicle body device protection structure of this embodiment, the device to be protected is the high-voltage unit 40 mounted on the vehicle, so that the high-voltage unit 40 can be placed under the floor of the vehicle body 1 to optimize the vehicle layout, while reliably preventing the subframe 20, which moves backward in the event of a frontal collision of the vehicle, from colliding with the high-voltage unit 40 or the high-voltage cable 45, thereby improving the safety of the vehicle.

[0053] While the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications are possible within the scope of the claims and the technical ideas described in the specification and drawings. For example, in the above embodiments, the device to be protected is a high-voltage unit, but the device to be protected by the vehicle body device protection structure of the present invention is not limited to a high-voltage unit and may be other devices.

[0054] In addition, in the above embodiment, the slider plate 30 (slider member) covers only the front side of the high-voltage unit 40, which is the device to be protected, but it may be configured to cover other parts as well, as long as it covers at least a portion of the front side. [Explanation of symbols]

[0055] 1. Body 10 Front side frame (side frame) 11 Base frame 12 Floor Frame 12a Front end 12b Closed section 14 Side sill 20 subframe 21,21 Side member 22,22 Extension part (rear end) 22a Top side 22b Bottom side 24 Cross member 30 Slider plate (slider component) 31 Slanted wall 31A Side inclined wall (side wall) 31B Central inclined wall (center wall) 31a Slope 32 Vertical Wall 33 Lower end 34 Bottom protection wall (bottom protection part) 40 High voltage unit (protected equipment) 43 Lower end 45 High voltage cable (cable) 47 Support member 50 Mounting material 51 Lower mounting surface (reinforced surface) 51a Upper end 51b Lower end 52 Upper mounting surface A. Engine room B Cable layout space D Gap

Claims

1. a side frame extending in the front-rear direction of the vehicle body at a side of the engine compartment; a subframe attached below the side frame to support suspension components; a protected device disposed under the floor of the vehicle body behind the subframe, a slider member that covers at least a front surface of the device to be protected; a mounting member disposed behind a rear end portion of the subframe and configured to mount the slider member to the vehicle body, the slider member has an inclined surface that faces the front of the vehicle body and slopes downward and rearward of the vehicle body, The mounting member has a reinforcing surface that is formed at the same inclination angle as the inclined surface and abuts against the inclined surface from behind. A vehicle body device protection structure characterized by:

2. the rear end portion of the subframe is a left and right extension portion extending rearward from a center portion on both sides in a vehicle width direction, The slider member includes side walls inclined downward and rearward of the vehicle body on both sides in the vehicle width direction, a central wall protruding downward from the side walls at the center in the vehicle width direction, and a vertical wall connecting a step portion between the side walls and the central wall in the vehicle width direction, the lower surface of the side wall is the inclined surface, A cable is disposed between the floor of the vehicle body and the central wall, and extends from the device to be protected through the central portion in the vehicle width direction toward the engine room.

2. The vehicle body device protection structure according to claim 1.

3. The slider member has a bottom protection portion extending rearward from the lower end of the inclined surface.

3. The vehicle body device protection structure according to claim 1 or 2.

4. The lower end of the inclined surface of the slider member extends below the lower end of the device to be protected.

4. The vehicle body device protection structure according to claim 1.

5. An upper end of the reinforcing surface is located higher than an upper surface of the rear end of the subframe, and a lower end of the reinforcing surface is located lower than a lower surface of the rear end of the subframe.

5. The vehicle body device protection structure according to claim 1.

6. The mounting member is a solid member.

6. The vehicle body device protection structure according to claim 1.

7. A floor frame having a closed cross section and extending in the front-rear direction of the vehicle is provided. The mounting member is attached to the vehicle body via the floor frame.

7. The vehicle body device protection structure according to claim 1.

8. the device to be protected is a high voltage unit mounted on a vehicle, The cable is a power cable that connects the high voltage unit to a power source in the engine room.

3. The vehicle body device protection structure according to claim 2.

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