Vehicle undercarriage

JP7883211B2Active Publication Date: 2026-07-01SUZUKI MOTOR CORP

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Patent Information

Authority / Receiving Office: JP · JP
Patent Type: Patents
Current Assignee / Owner: SUZUKI MOTOR CORP
Filing Date: 2024-10-30
Publication Date: 2026-07-01

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Abstract

To provide a vehicle lower part structure which can inhibit vibration of a cross member.SOLUTION: A vehicle lower part structure 100 according to the invention includes a floor panel 102 forming a floor surface of a vehicle. The vehicle lower part structure further includes: side sills 104 each extending in a vehicle fore and aft direction along an edge 110 of the floor panel; rear side members 124 each of which is disposed below the floor panel and at the inner side of the side sill in a vehicle width direction and extending in the vehicle fore and aft direction; and a second rear cross member 204 which extends in the vehicle width direction and joined to the side sill and the rear side member. The side sill is joined to the rear side member.SELECTED DRAWING: Figure 1

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Claims

1. Floor panels that form the floor surface of the vehicle, A side sill extending in the vehicle's longitudinal direction along the edge of the floor panel, A side member is positioned on the underside of the floor panel, on the inside of the side sill in the vehicle width direction, and extends in the vehicle longitudinal direction. In a vehicle understructure comprising a cross member joined to the side sill, The side member has an upwardly bulging portion that protrudes upward, The cross member is connected to the upward bulge, The cross member is positioned in front of the upward bulge, The vehicle understructure is characterized in that the rear end of the cross member is connected to the front end of the upward bulge.

2. The front end of the aforementioned upward bulge is inclined or arc-shaped when viewed from the side. The vehicle understructure according to claim 1, characterized in that the rear end of the cross member is inclined to match the front end of the upward bulge.

3. The side member has a recess below the front end of the upper bulge that is recessed from the front side of the upper bulge. The vehicle understructure according to claim 1 or 2, characterized in that the cross member has a protrusion connected to the recess.

4. A floor panel that forms the floor surface of a vehicle, A side sill extending in the vehicle's longitudinal direction along the edge of the floor panel, A side member is positioned on the underside of the floor panel, on the inside of the side sill in the vehicle width direction, and extends in the vehicle longitudinal direction. In a vehicle understructure comprising a cross member joined to the side sill, The side member has an upwardly bulging portion that protrudes upward, The cross member is connected to the upward bulge, The aforementioned side member has an inclined portion that is inclined outward in the vehicle width direction as it approaches the rear. The vehicle understructure is characterized in that the upper bulge is provided on the inclined portion.

5. The side member has a straight section extending in the front-rear direction on the front side of the inclined section, The vehicle understructure according to claim 4, characterized in that the inclined portion extends from the front side to the rear side of the cross member, and the inclination angle of the rear side of the cross member is greater than the inclination angle of the front side of the cross member.