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Lower structure of automotive vehicle

一种汽车、车辆的技术，应用在汽车的下部结构领域，能够解决支撑刚性下降、悬架横梁断开、刚性降低等问题

Inactive Publication Date: 2011-08-24
MAZDA MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, if the suspension beam can be easily detached from the vehicle body as in the above-mentioned conventional technology, there will be a problem that the support rigidity of the suspension beam in the vehicle width direction will decrease when the vehicle is running normally.
[0012] For example, in Patent Document 1, the support rigidity of the suspension beam in the vehicle width direction is not considered at all, and only the suspension beam is intended to be easily disconnected from the bracket, so that the support rigidity of the suspension beam in the vehicle width direction decreases during normal driving.
[0013] In addition, in Patent Documents 2 and 3, since the slits are formed in each arm portion, the rigidity of the connection portion with the vehicle body (side rail) decreases in the entire vertical direction.
Therefore, in the conventional technologies disclosed in Patent Documents 2 and 3, the support rigidity of the suspension cross member in the vehicle width direction also decreases during normal running.

Method used

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  • Lower structure of automotive vehicle
  • Lower structure of automotive vehicle
  • Lower structure of automotive vehicle

Examples

Experimental program
Comparison scheme
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no. 1 approach

[0054] figure 1 is a plan view showing the lower structure of the automobile according to the present embodiment, figure 2 is a side sectional view of the substructure. like figure 1 , figure 2 As shown, the vehicle body 1 of the vehicle V is provided with a dash panel 2 that separates the vehicle compartment S and the engine compartment E at the front and rear (refer to figure 2 ), and a pair of left and right front side members 3 arranged on the front side of the dash panel 2 . In addition, an arrow "F" in the drawing indicates the front of the vehicle body, and an arrow "R" indicates the rear of the vehicle body.

[0055] An engine room E is formed between the pair of front side members 3, and a power unit P / U including an engine 4, a transmission 5, and the like is installed in the engine room E. in addition, figure 1 The part indicated by the symbol 4a is the exhaust system of the engine 4 . The present invention is not necessarily limited to the engine 4 being ...

no. 2 approach

[0166] In the first embodiment, on the intermediate mounting member 61, a part that supports the lower portion 21c of the tubular mounting member 21 is constituted by a member other than the front side plate member 61B and the rear side plate member 61C, but the present invention is not necessarily limited thereto. here. For example, it is also possible to Figure 18 , Figure 19 In the illustrated intermediate mounting member 71, the lower support portion 71h corresponding to the lower support member 61D is integrally formed with the rear side plate 71C. in addition, Figure 18 It is a perspective view showing the intermediate part mounting member 71 according to the second embodiment of the present invention, Figure 19 yes Figure 18 The XIX-XIX line of the cross-sectional view. In addition, in Figure 18 , Figure 19 in, right with Figure 1 to Figure 17 Components that are the same as those in the first embodiment shown are assigned the same symbols and descriptio...

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PUM

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Abstract

The invention relates to a lower structure of automotive vehicle. A suspension cross member comprises a middle-portion attaching member which extends upwardly from a suspension cross member body, and a pipe-shaped attaching member which is supported at a support portion provided at an upper portion of the middle-portion attaching member. A side portion, in a vehicle width direction, a front portion and a rear portion, in a vehicle longitudinal direction, of a side face portion of the attaching member are supported at the support portion. A lower portion of the attaching member is supported at the support portion with a specified support rigidity, in the vehicle longitudinal direction, which is lower than that of the supporting of the side portion, the front portion or the rear portion of the side face portion of the attaching member. The lower structure of the automotive vehicle can secure the support rigidity of the suspension cross member during the normal vehicle traveling and also achieve the smooth retreat of the power unit to restrain the collision load from having bad influence on passengers in the vehicle frontal collision.

Description

technical field [0001] The present invention relates to an automobile substructure comprising a pair of left and right side beams extending forward from approximately the front of the cabin, and a power unit provided between the side beams behind or directly below the side beams. The suspension cross member (suspension cross member). Background technique [0002] Conventionally, at the time of a frontal collision of a vehicle, etc., a power unit installed at the front of the vehicle is retracted to absorb the collision energy, thereby suppressing the influence of the collision load applied to the occupants in the vehicle interior. [0003] However, a suspension beam for supporting a suspension arm for the front wheel is generally provided behind or directly below the power unit. Therefore, when the power unit moves backward due to the collision load as described above, the movement of the power unit to move backward is hindered by the suspension beam. [0004] Thus, conven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D21/15B62D25/20
CPCB62D21/155B62D21/11
Inventor 竹下弘明大谷隆广福岛正信
Owner MAZDA MOTOR CORP