Vehicle rear structure

Abstract

To improve strength of a vehicle rear part where a battery is mounted.SOLUTION: A vehicle rear-part structure 100 includes: left and right rear-part structural members 30L and 30R which are respectively connected to rear ends of left and right rockers 10L and 10R, and to left and right rear pillars 20 L and 20R, and which extend to a vehicle rear side; a partition wall panel 40 which connects the left and right rear-part structural members 30L and 30R, and which partitions a space between the left and right rear-part structural members 30L and 30R in a vertical direction and in a front-rear direction; and front and rear cross members 50 and 55 which are connected to the partition wall panel 40, and which connects the left and right rear-part structural members 30L and 30R. A battery 60 is mounted on respective upper parts of the front and rear cross members 50 and 55.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a rear structure of a vehicle in which a battery is mounted at the rear of the vehicle.

Background Art

[0002] In recent years, hybrid vehicles that are driven by an engine and a motor have been used. In such hybrid vehicles, a battery that supplies power to the motor is mounted inside the luggage compartment at the rear of the vehicle (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, since the battery that supplies voltage to the motor is a high-voltage component, protection is required in the event of a rear-end collision of the vehicle. Therefore, it is necessary to improve the strength of the rear part of the vehicle.

[0005] Therefore, an object of the present disclosure is to improve the strength of the rear part of a vehicle on which a battery is mounted. .

Means for Solving the Problems

[0006] The rear structure of a vehicle according to the present disclosure includes a pair of left and right rear structure members that are respectively connected to the rear ends of the left and right rockers and the left and right rear pillars and extend rearward of the vehicle, a partition panel that connects between the left and right rear structure members in the vehicle width direction and partitions the space between the rear structure members in the vertical and longitudinal directions, and a plurality of cross members that are connected to the partition panel and connect between the left and right rear structure members in the vehicle width direction. The rear structure of the vehicle is characterized in that a common battery is mounted on each upper portion of each of the cross members.

[0007] This improves the strength of the rear of the vehicle where the battery is located, allowing for better protection of the battery in the event of a rear-end collision.

[0008] In the vehicle rear structure of this disclosure, a power control device may be housed in the lower part of the bulkhead panel.

[0009] This allows the power control unit to be housed in the high-strength rear of the vehicle, thus providing adequate protection for the power control unit in the event of a rear-end collision.

[0010] In the vehicle rear structure of the present disclosure, the rear component is a hollow member formed by integral casting and comprises a main body, a tower, and a suspension member, wherein at least a portion of the main body has a closed cross-section and extends in the longitudinal direction of the vehicle, connecting the rear pillar and the rear member at the rear of the vehicle, the tower is connected to the upper side of the main body and has a space for housing a part of the suspension system, and the suspension member may have at least a closed cross-section and extend in the longitudinal direction of the vehicle below the main body, with its front end connected to the rocker and the rear pillar.

[0011] In this way, by constructing the rear components as integrally cast hollow members, it is possible to reduce the weight of the vehicle and improve its strength and rigidity. [Effects of the Invention]

[0012] This disclosure can improve the strength of the rear of a vehicle where a battery is mounted. [Brief explanation of the drawing]

[0013] [Figure 1] This is a plan view showing the rear structure of the vehicle according to the embodiment. [Figure 2] This is a vertical cross-sectional view showing the rear vehicle structure of the embodiment, which is the AA section shown in Figure 1. [Modes for carrying out the invention]

[0014] The vehicle rear structure 100 of the embodiment will be described below with reference to the drawings. The arrows FR, UP, and RH shown in each figure indicate the front, top, and right sides of the vehicle 200 equipped with the vehicle rear structure 100, respectively. The opposite directions of each arrow FR, UP, and RH indicate the rear, bottom, and left sides. When simply using the directions front / back, left / right, and up / down, unless otherwise specified, these refer to the front / back in the front-back direction, left / right in the left-right direction, and up / down in the up / down direction of the vehicle 200. Furthermore, for left and right symmetrical components, the left component is distinguished by adding "L" to the end of its reference numeral, and the right component by adding "R" to the end of its reference numeral.

[0015] As shown in Figures 1 and 2, the vehicle rear structure 100 includes a left rocker 10L and a right rocker 10R, a left rear pillar 20L and a right rear pillar 20R, a left rear component 30L and a right rear component 30R, a bulkhead panel 40, a front cross member 50 and a rear cross member 55, and a battery 60.

[0016] The right rocker 10R is a rectangular, closed-section structural member that extends in the front-rear direction at the right end of the vehicle 200. The right rear pillar 20R is a closed-section structural member that is attached to the upper surface of the rear end 11R of the right rocker 10R and extends upward from the upper surface of the rear end 11R. The right roof rail 25R is attached to the upper end 22R of the right rear pillar 20R. The left rocker 10L and left rear pillar 20L are symmetrical to the right rocker 10R and right rear pillar 20R, so the letter "L" is added to the end of the reference numerals for each member of the left rocker 10L and left rear pillar 20L in the figure, and their explanations are omitted.

[0017] The right rear component 30R is a structural member that extends to the rear of the vehicle, connected to the rear end 11L of the right rocker 10R and the lower end 21R of the right rear pillar 20R. The right rear component 30R is a hollow member that is integrally cast and includes the right main body 31R, the right tower 33R, the right suspension member 35R, and the right front end block 37R.

[0018] The right main body portion 31R extends in the longitudinal direction of the vehicle with at least a portion of its closed cross-section, connecting the right rear pillar 20R and the right rear member 71R at the rear of the vehicle. The closed cross-sectional shape of the right main body portion 31R and the closed cross-sectional shape of the right rear member 71R are identical. Therefore, when the right rear member 71R is connected to the rear end 32R of the right main body portion 31R, the right main body portion 31R and the right rear member 71R constitute a rear side member, which is a structural member extending from the right rear pillar 20R toward the rear of the vehicle. A right rear end plate 72R is attached to the rear end of the right rear member 71R. A rear floor panel 77, which constitutes the floor of the rear cargo compartment of the vehicle 200, is attached above the right rear member 71R.

[0019] The right tower section 33R is connected to the upper part of the right main body section 31R and has a space for housing a part of the suspension system (not shown). The right tower section 33R is a closed-section structure that extends upward from the right main body section 31R. An upper right pedestal 34R is provided at the upper end of the right tower section 33R. The rear end of the right roof rail 25R and the right end of the cross connecting member 75 are connected to the upper right pedestal 34R. The cross connecting member 75 and the right rear member 71R are connected by a right support column 76R. The rear end of the right connecting member 26R, which will be described later, is also connected to the upper right pedestal 34R.

[0020] The right suspension member section 35R has a closed cross-section in at least part of it and extends in the longitudinal direction of the vehicle below the right main body section 31R, as shown in Figure 2. The front end of the right suspension member section 35R is connected to the lower half of the right front end block 37R. As shown in Figure 2, a cylindrical opening 36R is provided in the center of the right suspension member section 35R through which the drive shaft (not shown) of the vehicle 200 passes. A base (not shown) to which an arm (not shown) of the suspension device (not shown) is connected is provided on the right side of the right suspension member section 35R. A base (not shown) to which a transaxle (not shown) is connected is provided on the left side of the right suspension member section 35R.

[0021] The right front block 37R is a square closing member where the front end of the right main body part 31R and the front end of the right suspension member part 35R are connected. On the upper part of the right front block 37R, there is a right receiving seat 38R to which the front end of the right connecting member 26R is connected. The lower part in front of the right front block 37R is connected to the rear end part 11R of the right rocker 10R, and the upper part is connected to the rear surface of the right rear pillar 20R. In this way, the right main body part 31R is connected to the right rear pillar 20R via the right front block 37R, and the right suspension member part 35R is connected to the rear end part 11R of the right rocker 10R and the right rear pillar 20R via the right front block 37R.

[0022] As described above, the right rear component 30R has been explained. Since the left rear component 30L is symmetric to the right rear component 30R about the left - right axis, the description is omitted by adding "L" at the end of the reference numerals of each member of the left rear component 30L in the figure.

[0023] An upper right side panel 27R is attached to a substantially triangular part surrounded by the right rear pillar 20R, the right roof rail 25R, the right connecting member 26R, and the right upper pedestal 34R. Similarly, an upper left side panel 27L is attached to a substantially triangular part surrounded by the left rear pillar 20L, the left roof rail 25L, the left connecting member 26L, and the left upper pedestal 34L.

[0024] The partition panel 40 is a plate member that connects between the right rear component 30R and the left rear component 30L in the vehicle width direction and partitions the space between the right rear component 30R and the left rear component 30L in the vertical and front - rear directions. The partition panel 40 is composed of a rear standing panel 41, a rear panel 42, a front panel 43, and a front standing panel 44.

[0025] The rear vertical panel 41 is a vertical wall-shaped plate member that connects the left side of the right main body portion 31R of the right rear component 30R and the right side of the left tower portion 33L of the left rear component 30L. As shown in Figure 1, the rear vertical panel 41 is composed of a first portion 41a that extends to the left from the left side of the right main body portion 31R in a plan view, past the center in the vehicle width direction; a second portion 41b that bends forward from the first portion 41a and extends toward the front of the vehicle; and a third portion 41c that bends to the left from the second portion 41b and extends toward the left, connecting to the right side of the left tower portion 33L. The lower ends of the first portion 41a, the second portion 41b, and the third portion 41c of the rear vertical panel 41 are connected to the upper surface of the rear floor panel 77.

[0026] The rear panel 42 is a flat plate member that is connected to the upper end of the rear vertical panel 41 and extends forward of the vehicle to the front portion of the right tower section 33R and the left tower section 33L. The right end of the rear panel 42 is connected to the upper end of the left side of the right tower section 33R of the right rear component 30R, and the left end of the rear panel 42 is connected to the upper end of the right side of the left tower section 33L of the left rear component 30L.

[0027] The front panel 43 is a folded plate member that includes an inclined plate extending diagonally forward from the front end of the rear panel 42, and a flat plate portion extending forward from the front end of the inclined plate. The right and left ends of the front panel 43 are connected to the upper right side panel 27R and the upper left side panel 27L, respectively.

[0028] The front panel 44 is an inclined plate that extends downward from the front end of the front panel 43.

[0029] The front cross member 50 is a closed-section member that connects the front upper surface of the right tower portion 33R of the right rear component 30R and the front upper surface of the left tower portion 33L of the left rear component 30L in the vehicle width direction. The front cross member 50 is located below the front end of the rear panel 42. The upper surface of the front cross member 50 is connected to the lower surface of the front end of the rear panel 42.

[0030] The rear cross member 55 is a closed-section member that connects a bracket (not shown) attached to the upper surface of the right main body portion 31R of the right rear component 30R and a bracket (not shown) attached to the upper surface of the left main body portion 31L of the left rear component 30L in the vehicle width direction. The rear cross member 55 is located on the upper part of the rear end of the rear panel 42. The lower surface of the rear cross member 55 is connected to the upper surface of the rear end of the rear panel 42.

[0031] A common battery 60 is mounted on top of the front cross member 50 and the rear cross member 55. The battery 60 is a rectangular parallelepiped, and fixing flanges 62 and 61 are provided at the front and rear ends of the vehicle, respectively. The front fixing flange 62 is placed on a receiving seat 43a provided at the front end of the rear panel 42 and is fixed to the upper surface of the front cross member 50 together with the rear panel 42 using bolts 64. The rear fixing flange 61 is placed on the upper surface of the rear cross member 55 and is fixed to the upper surface of the rear cross member 55 using bolts 63.

[0032] As shown in Figures 1 and 2, a power control device 80 is housed in the lower part of the rear panel 42 of the bulkhead panel 40. A fuel tank 85 is housed in the lower part of the front panel 43.

[0033] The rear vehicle structure 100 described above can increase the strength of the rear of the vehicle 200 by connecting the bulkhead panel 40, the front cross member 50, and the rear cross member 55 between the right rear component 30R and the left rear component 30L in the vehicle width direction. Furthermore, since the rear panel 42 of the bulkhead panel 40 is connected to the front cross member 50 and the rear cross member 55, the impact force when the vehicle 200 is rear-ended can be transmitted as a shear force to the rear panel 42, thereby suppressing deformation of the rear of the vehicle 200 during a collision. As a result, damage to the battery 60 when the vehicle 200 is rear-ended can be suppressed and the battery 60 can be protected.

[0034] Furthermore, since the power control device 80 is housed in the lower part of the rear panel 42, which is connected to the front cross member 50 and the rear cross member 55, the power control device 80 can be protected in the event of a rear-end collision by the vehicle 200.

[0035] Furthermore, since the right rear component 30R and the left rear component 30L are made of integrally cast hollow members, it is possible to reduce the weight of the vehicle 200 and improve its strength and rigidity. [Explanation of Symbols]

[0036] 10L Left rocker, 10R Right rocker, 11L, 11R Rear end, 20L Left rear pillar, 20R Right rear pillar, 21R Lower end, 22R Upper end, 25L Left roof rail, 25R Right roof rail, 26L Left connecting member, 26R Right connecting member, 27L Upper left side panel, 27R Upper right side panel, 30L Left rear component, 30R Right rear component, 31L Left main body, 31R Right main body, 32R Rear end, 33L Left tower section, 33R Right tower section, 34L Upper left base, 34R Upper right base, 35R Right suspension member section, 36R Opening, 37R Right front end block, 38R Right support seat, 40 Bulkhead panel, 41 Rear panel, 41a First section, 41b Part 2, 41c Part 3, 42 Rear panel, 43 Front panel, 43a Mounting seat, 44 Front panel, 50 Front cross member, 55 Rear cross member, 60 Battery, 61, 62 Fixing flanges, 63, 64 Bolts, 71R Right rear member, 72R Right rear end plate, 75 Cross connecting member, 76R Right support, 77 Rear floor panel, 80 Power control unit, 85 Fuel tank, 100 Rear structure of vehicle, 200 Vehicle.

Claims

[Claim 1] A pair of left and right rear components are connected to the rear ends of the left and right rockers and to the left and right rear pillars, respectively, and extend toward the rear of the vehicle. A bulkhead panel connects the left and right rear components in the vehicle width direction and partitions the space between the rear components in the vertical and front-rear directions, A vehicle rear structure comprising a plurality of cross members connected to the bulkhead panel and connecting the left and right rear components in the vehicle width direction, A common battery is mounted on the upper part of each of the aforementioned cross members. A rear vehicle structure characterized by the following.

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