Vehicle underbody structure

Abstract

The aerodynamic cover attached to the lower arm of the rear suspension must satisfy the required aerodynamic performance while also satisfying other performance aspects such as impact resistance, drainage, noise prevention, and reduction of cost and assembly time. [Solution] The aerodynamic cover 42 attached to the lower arm 14 of the rear suspension 10 comprises a flat plate portion 46 that covers the bottom surface portion 14b of the lower arm 14 and protrudes rearward, and a front curved surface portion 47 that is continuous in the forward direction with respect to the bottom surface portion 146 of the flat plate portion 46 and has a front rising bottom surface portion 147 that forms a curved shape that rises upward at the front of the lower arm 14. A locking piece portion 19 that engages with the flat plate portion 46 is provided at the rear of the lower arm 14, and a hook portion 49 is provided at the upper part 47U of the front curved surface portion 47 that protrudes rearward and hooks onto the upper front end portion 14d of the lower arm 14 from the front and above, and works in cooperation with the locking piece portion 19 to fix it to the lower arm 14.

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