# US 2019/0168809 A1 · Vehicle body lower portion structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168809 A1 - Document ID: US20190168809A1 - Status: Published application - Kind: A1 - Application number: 16/254,103 - Filed: 2019-01-22 - Published: 2019-06-06 - Earliest claimed: 2016-11-30 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Tatsuya AYUKAWA - Web page: https://patentgrep.com/patent/US20190168809A1 ## CPC - B62D 21/155: {Sub-frames or underguards} - B62D 21/152: {Front or rear frames} - B62D 21/157: {for side impacts} - B62D 25/025: {Side sills thereof} - B62D 25/20: Floors or bottom sub-units {(sub-frames for mounting engine or suspensions B62D21/11; drip trays F16N31/006)} - B62D 25/2009: {in connection with other superstructure subunits} - B62D 25/2036: {the subunits being side panels, sills or pillars (B62D21/157 takes precedence)} - B62D 29/008: {predominantly of light alloys, e.g. extruded} - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) ## Abstract A vehicle body lower portion structure includes: a lower frame member formed as a chamber that extends in a vehicle body longitudinal direction, having a guide portion at inner surfaces of wall portions that structure the chamber, the lower frame member being disposed at a vehicle body lower side; and a reinforcing member formed as a second chamber that extends in the vehicle body longitudinal direction, having a plurality of projections at outer surfaces of wall portions that structure the second chamber, the reinforcing member being provided within the chamber of the lower frame member in a state in which the plurality of projections are made to contact the guide portion. ## Claims ### Claim 1 A vehicle body lower portion structure, comprising: a rocker formed as a chamber that extends in a vehicle body front-rear direction; a floor panel joined to the rocker; an under member joined to the floor panel at an inner side, in a vehicle body transverse direction, of the rocker; an energy absorbing member formed as a chamber that extends in the vehicle body front-rear direction, the energy absorbing member being joined to a lower wall of the rocker and joined to a lower wall of the under member; and a battery configured to be disposed at an inner side, in the vehicle body transverse direction, of the under member and the energy absorbing member. ### Claim 2 (depends on 1) The vehicle body lower portion structure of claim 1, wherein at least a portion of the energy absorbing member is disposed between the rocker and the under member, in a vehicle body vertical direction and in the vehicle body transverse direction. ### Claim 3 (depends on 1) The vehicle body lower portion structure of claim 1, wherein the energy absorbing member is divided into a plurality of sections by a plurality of partitioning walls as viewed in the vehicle body front-rear direction. ### Claim 4 (depends on 3) The vehicle body lower portion structure of claim 3, wherein the under member is formed in the shape of a hat in cross-section, extends in the vehicle body front-rear direction, and at least one of the plurality of sections of the energy absorbing member is disposed so as to oppose each side wall of the under member. ### Claim 5 (depends on 3) The vehicle body lower portion structure of claim 3, wherein a reinforcement member is disposed within one of the plurality of sections of the energy absorbing member. ### Claim 6 (depends on 5) The vehicle body lower portion structure of claim 5, wherein the reinforcement member is disposed between the rocker and the under member in the vehicle body transverse direction. ### Claim 7 (depends on 1) The vehicle body lower portion structure of claim 1, further comprising: an upper member disposed above the under member with the floor panel disposed therebetween; and a connecting member joining the upper member and an inner side wall that is disposed at an inner side, in the vehicle transverse direction, of the rocker. ### Claim 8 (depends on 1) The vehicle body lower portion structure of claim 1, further comprising a battery frame, wherein: the battery is configured to be installed at the battery frame, and the battery frame is joined to the energy absorbing member. ### Claim 9 (depends on 5) The vehicle body lower portion structure of claim 5, wherein the reinforcing member is formed as a rectangular chamber extending in the vehicle body front-rear direction, and has a plurality of projections provided at a top surface of a top wall, and a bottom surface of a bottom wall, of the reinforcing member, wherein peak portions of the plurality of the projections are configured to contact an upper surface of a bottom wall, and a lower surface of a top wall, of the one of the plurality of sections of the energy absorbing member. ### Claim 10 (depends on 9) The vehicle body lower portion structure of claim 9, wherein a plurality of sectioning walls, which partition an interior of the chamber of the reinforcing member, are formed integrally with the reinforcing member.