Vehicle rear structure

Abstract

The utility model provides a rear structure of a vehicle. The rear structure of the vehicle can enable load transmission efficiency to be improved when a rear collision occurs. The vehicle rear structure (S) is provided with a vehicle rear frame member (18) integrally molded by casting. A vehicle rear frame member (18) is provided with a pair of left and right rear wheel arches (42) and a pair of left and right rear side members (40). The rear side surface member (40) is provided with a side wall section (40A), an upper wall section (40B), and a lower wall section (40C). The rear side member (40) is further provided with a first rib (41A) protruding from the lower wall portion (40C) toward the lower side of the vehicle, and a second rib (41B) protruding from the side wall portion (40A) toward the outer side in the width direction of the vehicle.

Description

Technical Field

[0001] This utility model relates to a rear structure of a vehicle. Background Technology

[0002] Patent Document 1 discloses a front body structure that effectively absorbs load energy at the inclined portion of the front side member in response to input loads from the front, while suppressing the deformation of the inclined portion to control the rearward movement of the vehicle body. Ribs are provided on the front side member of this front body structure.

[0003] Prior art literature

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2004-224251 Utility Model Content

[0006] The problem to be solved by the utility model

[0007] The purpose of this invention is to provide a rear vehicle structure that can optimize load transfer efficiency during a rear-end collision.

[0008] Methods for solving problems

[0009] Technical solution 1 describes a vehicle rear structure comprising a vehicle rear frame component integrally formed by casting. The rear frame component comprises: a pair of left and right rear wheel arches; a pair of left and right rear side members extending in the vehicle's longitudinal direction, each rear side member comprising: a side wall portion with its thickness direction facing the vehicle's width direction; an upper wall portion extending outward from the side wall portion in the vehicle's width direction, with its thickness direction facing the vehicle's vertical direction; a lower wall portion extending outward from the side wall portion in the vehicle's width direction, with its thickness direction facing the vehicle's vertical direction; a first rib protruding downward from the lower wall portion; and a second rib protruding outward from the side wall portion in the vehicle's width direction.

[0010] In technical solution 1, the rear structure of the vehicle includes a rear frame component integrally formed by casting. The rear frame component includes a pair of left and right rear wheel arches and a pair of left and right rear side members extending in the longitudinal direction of the vehicle. The rear side members include: a side wall portion with its thickness direction facing the width direction of the vehicle; an upper wall portion extending outward from the side wall portion in the width direction of the vehicle and with its thickness direction facing the vertical direction of the vehicle; and a lower wall portion extending outward from the side wall portion in the width direction of the vehicle and with its thickness direction facing the vertical direction of the vehicle.

[0011] In addition, during a rear-end collision, out-of-plane deformation occurs at each wall portion that constitutes the rear side member, which may result in a deterioration in the efficiency of collision load transmission.

[0012] Therefore, in technical solution 1, the rear side member also has: a first rib that protrudes from the lower wall portion toward the lower side of the vehicle; and a second rib that protrudes from the side wall portion toward the outer side in the width direction of the vehicle.

[0013] Therefore, by means of the first rib and the second rib, out-of-plane deformation of the lower wall and side wall of the rear side member can be suppressed, thereby maximizing the load transfer efficiency during a rear-end collision.

[0014] Utility Model Effect

[0015] As explained above, according to this invention, a vehicle rear structure is obtained that can optimize load transfer efficiency in the event of a rear-end collision. Attached Figure Description

[0016] Figure 1 A cross-sectional view showing a portion of the rear frame component of a vehicle. Figure 2 (Sectional view along line 1-1).

[0017] Figure 2 This is a three-dimensional view of the rear frame components of the vehicle. Detailed Implementation

[0018] The following uses Figure 1 , Figure 2 The rear structure of the vehicle involved in the implementation method will be described.

[0019] Additionally, in the diagrams, the arrow marker FR indicates the front of the vehicle, UP indicates the top of the vehicle, RH indicates the right side in the vehicle's width direction, and OUT indicates the outside in the vehicle's width direction. Furthermore, in the following descriptions, unless otherwise specified, the directions front-back, up-down, and left-right refer to the front-back direction, up-down direction, and left-right direction in the vehicle's width direction.

[0020] like Figure 2 As shown, the rear structure S of the vehicle includes a rear frame component 18. The rear frame component 18 is integrally formed by casting. Specifically, the rear frame component 18 is integrally formed by die casting using materials such as aluminum alloy and magnesium alloy.

[0021] The rear frame component 18 of the vehicle has a pair of left and right rear wheel arches 42 and a pair of left and right rear side members 40 extending in the longitudinal direction of the vehicle. In addition, the rear frame component 18 of the vehicle has a connecting portion 44 that connects the pair of left and right rear side members 40 in the width direction of the vehicle.

[0022] like Figure 1 As shown, the rear side member 40 includes: a side wall portion 40A, whose thickness direction faces the vehicle width direction; an upper wall portion 40B, whose thickness direction faces the vehicle vertical direction; and a lower wall portion 40C, whose thickness direction faces the vehicle vertical direction. The upper wall portion 40B extends outward in the vehicle width direction from the upper end of the side wall portion 40A. The lower wall portion 40C extends outward in the vehicle width direction from near the lower end of the side wall portion 40A. In other words, the rear side member 40, which is formed by the side wall portion 40A, the upper wall portion 40B, and the lower wall portion 40C, has a roughly U-shaped (roughly ko-shaped) structure that opens outward in the vehicle width direction, serving as a frame member. Furthermore, in Figure 1 In the middle, the portion extending from the outer end of the upper wall portion 40B in the vehicle width direction toward the upper side of the vehicle is connected to the rear wheel arch 42.

[0023] Furthermore, the rear side member 40 has multiple protrusions (in) from the lower wall portion 40C toward the underside of the vehicle. Figure 1 The first rib 41A (which has five ribs in the middle) extends along the direction in which the rear side member 40 extends (approximately in the vehicle's front-to-back direction).

[0024] Furthermore, the rear side member 40 has a second rib 41B that protrudes outward from the side wall portion 40A in the vehicle width direction. The second rib 41B extends along the direction in which the rear side member 40 extends (approximately in the vehicle longitudinal direction).

[0025] The rear side member 40 extends generally in the vehicle's longitudinal direction. However, upon closer inspection, the rear side member 40 extends locally in a direction inclined relative to the vehicle's longitudinal direction. Therefore, although not shown in the figure, for example, the portion of the rear side member 40 corresponding to the rear wheel arch 42 (the portion overlapping in the vehicle's longitudinal direction) is located on the upper side of the vehicle compared to other portions. Furthermore, the portion of the rear side member 40 corresponding to the rear wheel arch 42 is located on the inner side in the vehicle's width direction compared to other portions.

[0026] Furthermore, the rear side member 40 includes reinforcing portions 40D and 40E. The reinforcing portions 40D and 40E each include a second lower wall portion 40D extending inward in the vehicle width direction from the lower end of the side wall portion 40A of the rear side member 40, and a second side wall portion 40E extending upward in the vehicle width direction from the inner end of the second lower wall portion 40D. The side wall portion 40A, the second lower wall portion 40D, and the second side wall portion 40E together form a generally U-shaped frame member with a cross-section open towards the upward side of the vehicle. Additionally, the space inside this generally U-shaped cross-section is used for accommodating wiring harnesses and other electrical wires. The reinforcing portions 40D and 40E are not provided over the entire range from the front end to the rear end of the rear frame member 18, but rather in a manner corresponding to a portion of the rear wheel arch 42. Therefore, the rear side member 40 is reinforced by the reinforcing portions 40D and 40E at the portion corresponding to the rear wheel arch 42. Furthermore, the rear side member 40 has multiple protrusions (in) extending from the second lower wall portion 40D toward the underside of the vehicle. Figure 1 (The middle part consists of four branches) Third rib 41C.

[0027] <Effects>

[0028] Next, the effects of this implementation method will be explained.

[0029] In this embodiment, such as Figure 2 As shown, the rear structure S of the vehicle includes a rear frame component 18 integrally formed by casting. The rear frame component 18 includes a pair of left and right rear wheel arches 42 and a pair of left and right rear side members 40 extending in the longitudinal direction of the vehicle. Figure 1 As shown, the rear side member 40 includes a side wall portion 40A with its thickness direction facing the vehicle width direction, an upper wall portion 40B extending outward from the side wall portion 40A in the vehicle width direction and with its thickness direction facing the vehicle vertical direction, and a lower wall portion 40C extending outward from the side wall portion 40A in the vehicle width direction and with its thickness direction facing the vehicle vertical direction.

[0030] In addition, during a rear-end collision, out-of-plane deformation will occur at the wall portions 40A, 40B, and 40C that constitute the rear side member 40, which may result in a deterioration in the efficiency of collision load transmission.

[0031] Therefore, in this embodiment, the rear side member 40 also includes a first rib 41A that protrudes from the lower wall portion 40C toward the vehicle's lower side and a second rib 41B that protrudes from the side wall portion 40A toward the vehicle's width direction outward.

[0032] Therefore, by means of the first rib 41A and the second rib 41B, out-of-plane deformation of the lower wall portion 40C and the side wall portion 40A of the rear side member 40 can be suppressed, thereby maximizing the load transfer efficiency during a rear-end collision.

[0033] Since the rear frame component 18 of the vehicle is integrally formed by casting, it is relatively easy to provide the first rib 41A and the second rib 41B. In addition, it is also relatively easy to provide reinforcement parts 40D and 40E that reinforce a part of the main body (side wall part 40A, upper wall part 40B and lower wall part 40C) of the rear side member 40.

[0034] Furthermore, although the rear side member 40 has reinforcing portions 40D and 40E in the above embodiment, the rear side member of this disclosure may not have reinforcing portions.

[0035] Furthermore, although in the above embodiment, the lower wall portion 40C extends outward in the vehicle width direction from near the lower end of the side wall portion 40A, the lower wall portion of this disclosure may also extend outward in the vehicle width direction from the lower end of the side wall portion 40A.

[0036] Symbol Explanation

[0037] S…rear structure of the vehicle;

[0038] 18… Rear frame components of the vehicle;

[0039] 40…rear side components;

[0040] 40A…sidewall portion;

[0041] 40B…Upper wall;

[0042] 40C…lower wall;

[0043] 41A…First Rib;

[0044] 41B…Second rib;

[0045] 42…rear wheel arch.

Claims

1. A vehicle rear structure comprising a vehicle rear frame component integrally formed by casting, characterized in that, The rear frame component of the vehicle includes: A pair of rear wheel arches on the left and right; A pair of rear side members, extending in the longitudinal direction of the vehicle. The rear side component includes: The sidewall portion is oriented with its thickness in the vehicle width direction; The upper wall portion extends outward in the vehicle width direction from the side wall portion, and its thickness direction faces the vehicle vertical direction; The lower wall portion extends outward in the vehicle width direction from the side wall portion, and its thickness direction faces the vehicle vertical direction. The first rib protrudes from the lower wall portion toward the underside of the vehicle; The second rib protrudes outward from the side wall portion in the vehicle width direction.

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