Vehicle rear part structure

Abstract

To provide a vehicle rear part structure which can suppress intrusion quantity of a battery at the time of a lateral collision of the vehicle.SOLUTION: A battery clamp 30 comprises: an inner side constitution part 34 which is arranged at an inner side of an auxiliary battery 24 in a vehicle width direction and whose lower end part is fixed to a vehicle body side; and an upper side constitution part 32 which is connected to an upper end part of the inner side constitution part 34 and extending at an upper surface side of the auxiliary battery 24 in the vehicle width direction to push down the auxiliary battery 24 from the upper side of the vehicle. A protruding part 50 is formed in the inner side constitution part 34. The protruding part 50 transfers, when buffer load at the time of a lateral collision is inputted into a portion of a vehicle rear side of a rear wheel house in a lateral side of a vehicle rear part, load from the inner side constitution part 34 to an outer end part of a seat skeleton of a rear seat in the vehicle width direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vehicle rear structure. [Background technology]

[0002] Patent Document 1 listed below discloses a vehicle rear structure in which a battery is mounted on the side of the rear of the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-26237 Summary of the Invention [Problem to be solved by the invention]

[0004] In a vehicle with a battery mounted on the rear side, it is necessary to limit the amount of battery intrusion during a side collision of the vehicle.

[0005] In consideration of the above, an object of the present invention is to provide a rear structure for a vehicle that can reduce the amount of battery intrusion during a side collision of the vehicle. [Means for solving the problem]

[0006] The vehicle rear structure according to a first aspect includes a rear wheel house provided on a side of the vehicle rear, a battery arranged on the vehicle floor on the vehicle rear side of the rear wheel house, an inner side component arranged inward in the vehicle width direction from the battery and having a lower end fixed to the vehicle body side, and an upper component connected to an upper end of the inner side component and extending along the vehicle width direction on an upper surface side of the battery to press down on the battery from above the vehicle, and a load transmission component configured to transmit a collision load during a side collision from the inner side component to an outer end of a seat frame of a rear seat in the vehicle width direction when the collision load is input to a portion of the side of the vehicle rear part that is on the vehicle rear side of the rear wheel house.

[0007] In addition, the phrase "when a collision load during a side collision is input" in the first embodiment may refer to a case where a collision load during a test, such as an occupant protection test during a side collision with a pole, is input.

[0008] According to a first aspect of the vehicle rear structure, a rear wheel house is provided on a side of the vehicle rear, and a battery is disposed on the vehicle floor behind the rear wheel house. The inner side component of the battery clamp is disposed inward in the vehicle width direction from the battery and has its lower end fixed to the vehicle body, and the upper component of the battery clamp is connected to the upper end of the inner side component and extends along the vehicle width direction on the upper surface of the battery to press down on the battery from above the vehicle. When a collision load during a side collision is input to the portion of the side of the vehicle rear that is on the vehicle rear side of the rear wheel house, the load transfer portion transfers the collision load from the inner side component to the outer end of the seat frame of the rear seat in the vehicle width direction. This makes it possible to reduce the amount of battery intrusion during a side collision compared to when the load transfer portion is not present.

[0009] The vehicle rear structure of the second aspect is the vehicle rear structure of the first aspect, wherein the seat skeleton has a widthwise member extending along the vehicle width direction, and the load transmission portion is composed of a protruding portion formed on one of the inner side component of the battery clamp and the outer end of the widthwise member of the seat skeleton in the vehicle width direction, and protruding so as to include a portion that overlaps with at least a portion of the other in a side view of the vehicle.

[0010] According to the vehicle rear structure of the second aspect, a protruding portion is provided on one of the inner side constituent portion of the battery clamp and the outer end portion of the width direction member of the seat frame in the vehicle width direction, and the protruding portion extends to include a portion that overlaps with at least a portion of the other in a side view of the vehicle, and the load transmission portion is configured by this protruding portion. Therefore, if the protruding portion is displaced inward in the vehicle width direction during a side collision, the protruding portion abuts against the other, thereby suppressing the amount of intrusion of the battery, and suppressing the narrowing of the interior space at the rear of the vehicle even when the load transmission portion is provided.

[0011] The vehicle rear structure according to the third aspect is the vehicle rear structure according to the first or second aspect, wherein the inner side component has a vertical wall portion that is bent and extends downward from the inner end of the upper component in the vehicle width direction, and a lower end extension portion that is bent and extends inward in the vehicle width direction from the lower end of the vertical wall portion and is fixed to the vehicle body, and the load transmission portion is composed of a protrusion portion that protrudes further forward in the vehicle than other parts of the vertical wall portion, and the protrusion portion and a front portion in the vehicle fore-and-aft direction of the lower end extension portion are formed continuously.

[0012] According to the vehicle rear structure of the third aspect, the vertical wall portion of the inner side constituent portion is a wall portion that is bent and extends downward from the inner end portion of the upper constituent portion in the vehicle width direction, and the lower end extension portion of the inner side constituent portion is bent and extends inward in the vehicle width direction from the lower end portion of the vertical wall portion and is fixed to the vehicle body. Here, the load transfer portion is formed by a protruding portion that protrudes further forward in the vehicle than other portions of the vertical wall portion, and the protruding portion and the front portion of the lower end extension portion in the vehicle fore-and-aft direction are formed continuously. This is advantageous for suppressing deformation of the protruding portion when the protruding portion of the inner side constituent portion abuts against the outer end portion of the seat frame of the rear seat in the vehicle width direction during a side collision, so that the collision load can be stably transferred from the protruding portion to the seat frame of the rear seat, and the provision of the load transfer portion prevents the passenger compartment space at the rear of the vehicle from becoming narrower. [Effects of the Invention]

[0013] As described above, the vehicle rear structure according to the present invention has the excellent effect of being able to reduce the amount of battery intrusion during a side collision of the vehicle. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a simplified plan view showing the schematic configuration of a vehicle rear structure according to an embodiment of the present invention; [Figure 2] 2 is a simplified rear view of the schematic configuration of the vehicle rear structure of FIG. 1.

[0023] FIG. [Figure 3] FIG. 2 is a perspective view showing the auxiliary battery mounted state. [Figure 4] FIG. 2 is a schematic cross-sectional plan view illustrating a state during a side collision. DETAILED DESCRIPTION OF THE INVENTION

[0015] A vehicle rear structure according to one embodiment of the present invention will be described with reference to Figures 1 to 4. In these figures, the arrow FR indicates the front side of the vehicle, the arrow UP indicates the upper side of the vehicle, and the arrow IN indicates the inside in the vehicle width direction.

[0016] (Configuration of the embodiment) Fig. 1 shows a simplified plan view of the schematic configuration of a vehicle rear structure according to one embodiment of the present invention. The vehicle 10 shown in Fig. 1 is a hybrid vehicle powered by an engine and a motor. As an example, the vehicle 10 is a vehicle with three rows of seats, but the front seats (first row seats) and second row seats (second row seats) are not shown in the figure, and only a third row seat 12, which is the rear seat in the last row, is shown.

[0017] In this embodiment, a well-known configuration is applied to the third seat 12, and therefore detailed description will be omitted, but a brief description will be given below. The third seat 12 is shown as a schematic block in Fig. 1, and is equipped with a seat cushion that supports the buttocks and thighs of the seated occupant, a seat back that supports the back of the seated occupant, and a headrest that supports the head of the seated occupant. The third seat 12 also has a seat framework 14, and a padding material is supported on the seat framework 14 and covered with a skin.

[0018] 1, the seat skeleton 14 is made up of, for example, pressed metal plates and metal pipes joined together. The seat skeleton 14 has width direction members 16 that extend along the vehicle width direction at the rear of the seat cushion. The width direction members 16 are made up of pipes and are highly rigid.

[0019] FIG. 2 shows a simplified rear view of the schematic configuration of the vehicle rear structure of FIG. 1. Note that in FIG. 2, the portion that supports the third seat 12 on the vehicle body side is omitted for ease of viewing. Also, in FIG. 2, some portions where members are in contact with each other are shown slightly separated for ease of viewing. As shown in FIGS. 1 and 2, below the third seat 12, an HV battery (main battery, high-voltage battery) 20 is disposed on a floor panel 18 that serves as the vehicle body floor. The HV battery 20 is a secondary battery for power, a high-voltage battery that stores electricity to operate the motor.

[0020] As shown in Fig. 1, a rear wheel house 22 is provided on the side of the vehicle rear part 10R. The rear wheel house 22 covers the rear tire T from above. An auxiliary battery 24 serving as a battery is disposed on the floor panel 18 on the vehicle rear side of the rear wheel house 22.

[0021] 3 is a perspective view showing the mounted state of the auxiliary battery 24. The auxiliary battery 24 is a box-shaped secondary battery. The auxiliary battery 24 has a lower voltage (12 V) than the HV battery 20 (see FIG. 1), and is provided to supply power to auxiliaries such as lights, wipers, and audio of the vehicle 10 (see FIG. 1). As shown in FIG. 3, the auxiliary battery 24 is disposed on the bottom wall portion 26A of the tray 26.

[0022] The tray 26 has a front wall 26B rising from the front end of the bottom wall 26A, an outer wall 26C rising from the outer end of the bottom wall 26A in the vehicle width direction, a rear wall 26D rising from the rear end of the bottom wall 26A, and a flange 26F extending from the center of the vehicle in the front-rear direction of the inner end of the bottom wall 26A in the vehicle width direction. A plurality of brackets 28 are fixed to the underside of the bottom wall 26A of the tray 26 by welding or the like. Each of the plurality of brackets 28 is fixed to the floor panel 18 and a vehicle body frame member (not shown), for example, by bolting.

[0023] The battery clamp 30 provided to hold the auxiliary battery 24 includes an inner side component 34 disposed inside the auxiliary battery 24 in the vehicle width direction and fixed at its lower end to the vehicle body, an upper component 32 connected to an upper end of the inner side component 34 and extending along the vehicle width direction on the upper surface side of the auxiliary battery 24 to press down on the auxiliary battery 24 from above the vehicle, and an outer side component 40 connected to an outer portion of the upper component 32 in the vehicle width direction and disposed outside the auxiliary battery 24 in the vehicle width direction and fixed at its lower end to the vehicle body. The positions of each component of the battery clamp 30 in the vehicle fore-aft direction are set to correspond to the center of the auxiliary battery 24 in the vehicle fore-aft direction. Details of the battery clamp 30 will be described later.

[0024] A longitudinally intermediate portion of a clamp reinforcing plate 48 extending along the vehicle longitudinal direction is fixed to the upper side of the vehicle widthwise central portion of the upper component 32 of the battery clamp 30. The clamp reinforcing plate 48 is manufactured by bending sheet metal and is formed into a substantially U-shape when viewed in the vehicle longitudinal direction. A front end 48A of the clamp reinforcing plate 48 is fixed to the rear side of the rear wheel house 22 (see FIG. 1) via a bracket (not shown). A rear end 48B of the clamp reinforcing plate 48 is fixed to the lower side of a D-pillar (not shown) via a bracket (not shown).

[0025] The upper component 32 has a hat-shaped cross section perpendicular to its longitudinal direction that is open upward (the side opposite the auxiliary battery 24). Specifically, the upper component 32 includes a U-shaped groove 32A that is generally U-shaped (or substantially C-shaped) and opens upward, and a pair of front and rear flanges 32B and 32C that extend in opposite directions from open ends (upper ends) on both sides of the U-shaped groove 32A in the vehicle longitudinal direction. The vehicle width direction intermediate portions of the front flange 32B and the rear flange 32C are fixed to the clamp reinforcing plate 48 described above.

[0026] The outer side constituent portion 40 has an outer bracket 42 whose lower end is fixed to the outer wall portion 26C of the tray 26, and a connecting bolt 44 that connects the outer bracket 42 to the outer end portion in the vehicle width direction of the upper constituent portion 32. The connecting bolt 44 has a lower side attached to the outer bracket 42 and an upper side that passes through the outer end portion in the vehicle width direction of the U-shaped groove portion 32A of the upper constituent portion 32 in a substantially vertical direction, and a nut 46 is tightened from above.

[0027] The inner side constituent portion 34 is formed integrally with the upper constituent portion 32. In other words, the upper constituent portion 32 and the inner side constituent portion 34 are formed from a single panel member. The inner side constituent portion 34 has a vertical wall portion 36 that is bent and extends downward from the inner end portion of the upper constituent portion 32 in the vehicle width direction, and a lower end extension portion 38 that is bent and extends inward in the vehicle width direction from the lower end portion of the vertical wall portion 36.

[0028] The inner side constituent portion 34 has a hat-shaped cross section perpendicular to its longitudinal direction. The vertical wall portion 36 of the inner side constituent portion 34 includes a substantially U-shaped (approximately C-shaped) main body portion 36A that is open toward the inside in the vehicle width direction, and a pair of front and rear flange portions 36B and 36C that extend in opposite directions from open ends on both sides of the main body portion 36A in the vehicle longitudinal direction. The lower end extension portion 38 of the inner side constituent portion 34 includes a substantially U-shaped (approximately C-shaped) recessed portion 38A that is open upward, and a pair of front and rear flange portions 38B and 38C that extend in opposite directions from open ends on both sides of the recessed portion 38A in the vehicle longitudinal direction. The recessed portion 38A of the lower end extension portion 38 is overlapped with the flange portion 26F of the tray 26 and fixed, for example, by bolt fastening. That is, the recessed portion 38A of the lower end extension 38 is fixed to the vehicle body via the tray 26 or the like.

[0029] A protruding portion 50 that protrudes further toward the front of the vehicle than other portions of the vertical wall portion 36 is formed on the front flange portion 36B of the vertical wall portion 36 of the inner side constituent portion 34. The protruding portion 50 is provided so as to transmit a collision load in a side collision from the inner side constituent portion 34 to the outer end portion in the vehicle width direction of the seat frame 14 of the third seat 12 (more specifically, the outer end portion 16A in the vehicle width direction of the width direction member 16) when the collision load is input to the portion of the side of the vehicle rear portion 10R of the vehicle that is on the vehicle rear side of the rear wheel house 22.

[0030] The protruding portion 50 (schematically shown in FIG. 1) serving as a load transfer portion protrudes so as to include a portion that overlaps with at least a portion of the outer end portion 16A of the width direction member 16 of the seat frame 14 in the vehicle width direction in a side view of the vehicle. As shown in FIG. 3, the protruding portion 50 is formed so as to include a portion that constitutes a part of the lower end portion of the vertical wall portion 36. The protruding portion 50 and the front portion 38F (part of the front flange portion 38B) of the lower end extension portion 38 in the vehicle fore-and-aft direction are formed continuously.

[0031] (Operation of the embodiment) Next, the operation and effects of this embodiment will be described.

[0032] In this embodiment, when a collision object 100 such as a pole collides with a portion of the side of the vehicle rear portion 10R shown in FIG. 1 that is on the vehicle rear side of the rear wheel house 22 and a collision load is input during a side collision, as shown schematically in FIG. 4, the overhanging portion 50 of the battery clamp 30 abuts against the vehicle width direction outer end portion 16A of the width direction member 16 of the seat skeleton 14 of the third seat 12. At this time, the overhanging portion 50 transmits the collision load from the inner side constituent portion 34 of the battery clamp 30 to the vehicle width direction outer end portion 16A of the seat skeleton 14 of the third seat 12. Therefore, it is possible to reduce the amount of intrusion of the auxiliary battery 24 during a side collision of the vehicle 10 (see FIG. 1) compared to when the overhanging portion 50 is not present.

[0033] To explain further, in this embodiment, the projection 50 formed on the inner side component 34 of the battery clamp 30 shown in FIG. 3 is configured to transmit the collision load from the battery clamp 30 to the seat frame 14 of the third seat 12 shown in FIG. 1 etc. during a side collision. Therefore, compared to, for example, a case where a load transmission member is provided between the inner side component 34 of the battery clamp 30 and the outer end 16A of the seat frame 14 in the vehicle width direction, the interior space in the rear part 10R of the vehicle is prevented from becoming narrower.

[0034] 3 extends so as to include a portion that overlaps, in a side view of the vehicle, with at least a portion of the outer end 16A in the vehicle width direction of the width direction member 16 of the seat skeleton 14 shown in Fig. 1 etc. Therefore, if the overhanging portion 50 is displaced inward in the vehicle width direction along the vehicle width direction during a side collision, the overhanging portion 50 comes into contact with the outer end 16A in the vehicle width direction of the width direction member 16 of the seat skeleton 14 as shown in Fig. 4, thereby suppressing the intrusion amount of the auxiliary battery 24.

[0035] 3, the vertical wall portion 36 of the inner side component 34 is a wall portion that extends from the inner end of the upper component 32 in the vehicle width direction while being bent downward toward the vehicle, and the lower end extension portion 38 of the inner side component 34 is bent from the lower end of the vertical wall portion 36 toward the inner side in the vehicle width direction and is fixed to the vehicle body. Here, the protruding portion 50 protrudes further forward in the vehicle than other portions of the vertical wall portion 36, and the protruding portion 50 and a front portion 38F of the lower end extension portion 38 in the vehicle fore-and-aft direction are formed continuously. Therefore, when the protruding portion 50 of the inner side component 34 abuts against the outer end 16A of the seat frame 14 of the third seat 12 in the vehicle width direction during a side collision as shown in FIG. 4, this is advantageous in suppressing deformation of the protruding portion 50, and the collision load can be stably transmitted from the protruding portion 50 to the seat frame 14 of the third seat 12.

[0036] As described above, the vehicle rear structure according to this embodiment makes it possible to reduce the amount of intrusion of the auxiliary battery 24 during a side collision of the vehicle 10 (see FIG. 1). Additionally, this embodiment also makes it possible to control the intrusion position and intrusion mode of the auxiliary battery 24 during a side collision. This can also contribute to reducing the impact on the HV battery 20 (see FIG. 1) during a side collision.

[0037] (Modifications of the embodiment) In the above embodiment shown in Figures 1 to 4, as an example, the protrusion 50 protrudes so as to include a portion that overlaps with at least a portion of the vehicle width direction outer end 16A of the width direction member 16 of the seat skeleton 14 in a side view of the vehicle. However, for example, if the protrusion 50 cannot be brought into contact with the vehicle width direction outer end 16A of the seat skeleton 14 with the same settings as in the above embodiment when an occupant protection test is performed during a specified side collision, a modified example can be adopted in which the position and range of the protrusion (50) are set so that the protrusion (50) abuts against the vehicle width direction outer end (16A) of the seat skeleton (14) when the test is performed.

[0038] Furthermore, in the above embodiment, the protrusion 50 is formed on the inner side component 34 of the battery clamp 30. However, as a variation of the above embodiment, the protrusion (50) is not formed on the inner side component (34) of the battery clamp (30), and instead a protrusion is formed on the vehicle width direction outer end (16A) of the width direction member (16) of the seat frame (14) so ​​as to include a portion that overlaps with at least a portion of the inner side component (34) of the battery clamp (30) in a side view of the vehicle, and the load transmission portion may be constituted by the protrusion.

[0039] Furthermore, as a modified example of the above embodiment, when a collision load during a side collision is input to the rear portion of the rear wheel house (22) among the side portions of the vehicle rear (10R), the load transmission portion that is provided to transmit the collision load from the inner side component (34) of the battery clamp (30) to the vehicle width direction outer end portion (16A) of the seat skeleton (14) of the rear seat (third seat 12) may be formed on both the inner side component (34) of the battery clamp (30) and the vehicle width direction outer end portion (16A) of the width direction member (16) of the seat skeleton (14), or may be provided between the inner side component (34) of the battery clamp (30) and the vehicle width direction outer end portion (16A) of the width direction member (16) of the seat skeleton (14).

[0040] In addition, in the above embodiment, the protrusion 50 and the front portion 38F of the lower end extension 38 in the fore-and-aft direction of the vehicle are formed continuously in the inner side component 34 of the battery clamp 30, and this configuration is preferable, but as a variation of the above embodiment, it is also possible to adopt a configuration in which the protrusion (50) and the front portion 38F of the lower end extension 38 in the fore-and-aft direction of the vehicle are not continuous.

[0041] The above-described embodiment and the above-described modifications can be implemented in appropriate combinations.

[0042] The above describes one example of the present invention, but the present invention is not limited to the above, and it goes without saying that the present invention can be implemented in various modified forms within the scope of the gist of the present invention. [Explanation of symbols]

[0043] 10R rear of vehicle 12 Third seat (rear seat) 14 Seat frame 16 Width direction member 16A Outer end of vehicle width 18 Floor panel (body floor) 22 Rear wheel house 24 Auxiliary battery (battery) 30 Battery clamp 32 Upper component 34 Inner side component 36 Vertical wall section 38 Lower end extension 38F Lower end extension part, front part in the vehicle longitudinal direction 50 Projection (load transfer part)

Claims

1. a rear wheel house provided on a side of the rear of the vehicle; a battery disposed on a vehicle body floor behind the rear wheel house; a battery clamp including: an inner side component disposed on the inner side of the battery in the vehicle width direction and having a lower end fixed to the vehicle body; and an upper component connected to an upper end of the inner side component and extending along the vehicle width direction on an upper surface side of the battery to press down on the battery from above the vehicle; a load transfer portion provided to transfer a collision load during a side collision from the inner side constituent portion to an outer end portion in the vehicle width direction of a seat frame of the rear seat when the collision load is input to a portion of the side portion of the vehicle rear portion that is on the vehicle rear side of the rear wheel house; A vehicle rear structure comprising:

2. the seat frame has a width direction member extending along the vehicle width direction, 2. The vehicle rear structure according to claim 1, wherein the load transfer portion is configured as a protruding portion formed on one of the inner side component of the battery clamp and the outer end portion of the width direction member of the seat frame in the vehicle width direction, and protruding so as to include a portion that overlaps with at least a portion of the other component in a side view of the vehicle.

3. the inner side constituent portion has a vertical wall portion that is bent and extends downward from an inner end portion of the upper constituent portion in the vehicle width direction, and a lower end extension portion that is bent and extends inward in the vehicle width direction from a lower end portion of the vertical wall portion and is fixed to a vehicle body side, the load transmission portion is configured as a protruding portion that protrudes further toward the front of the vehicle than other portions of the vertical wall portion, The vehicle rear structure according to claim 1 , wherein the protruding portion and a front portion of the lower end extension portion in the vehicle longitudinal direction are formed continuously.

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