SUB-FRAME STRUCTURE

• Main Authors: TAKAHASHI HAYATO, ONAKA RYO
• Format: Patent
• Language: English; Japanese
• Published: 08.10.2020
• Subjects: LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING

To prevent a rear member from being bent upward even in a case where a fragile part which is folded and bent when a load is input is brought into contact with a road surface and prevent a vehicle cabin from being deformed by a contact of members mounted on the rear member with the vehicle cabin.SOLUTION: Each of extension members 14 includes: a first fragile part 32 located on the front side of a vehicle at a connection part 28 and deformable downward when a load is input; and a second fragile part 34 located on the front side of the vehicle from the first fragile part and deformable upward when a load is input. The first fragile part is disposed on an upper surface of each of the extension members, and the second fragile part is disposed on a lower surface of each of the extension members. A height dimension (H1) of a vertical cross section of the first fragile part to the axis is smaller than a height dimension (H2) of a vertical cross section of the second fragile part to the axis (H1<H2).SELECTED DRAWING: Figure 2 【課題】荷重入力時に折り曲げられた脆弱部が地面に接触した場合であってもリヤメンバの上方への湾曲を阻止すると共に、リヤメンバに搭載される部材が車室側に接触することによる車室側の変形を防止すること。【解決手段】各エクステンションメンバ１４は、連結部２８の車両前方に位置し、荷重入力時に下方に向かって変形可能な第１脆弱部３２と、第１脆弱部より車両前方に位置し、荷重入力時に上方に向かって変形可能な第２脆弱部３４とを有し、第１脆弱部は、各エクステンションメンバの上面に設けられ、第２脆弱部は、各エクステンションメンバの下面に設けられ、第１脆弱部の軸直断面の高さ寸法（Ｈ１）は、第２脆弱部の軸直断面の高さ寸法（Ｈ２）よりも小さい（Ｈ１＜Ｈ２）。【選択図】図２