# US 10,479,302 B2 · Impact absorbing structure of vehicles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,479,302 B2 - Document ID: US10479302B2 - Status: Granted - Kind: B2 - Application number: 15/760,620 - Filed: 2016-11-08 - Published: 2018-09-06 - Granted: 2019-11-19 - Earliest claimed: 2015-11-20 - Assignees: Mazda Motor Corporation - Applicants: Mazda Motor Corporation - Inventors: Chikara Kawamura; Taiki Yotsuyanagi; Hiroaki Takeshita; Tsuyoshi Nishihara; Tsuneki Shimanaka; Takayuki Kimura; Yoshiaki Murakami - Web page: https://patentgrep.com/patent/US10479302B2 ## CPC - B60R 19/34: destroyed upon impact, e.g. one-shot type - B60R 19/03: characterised by material, e.g. composite (B60R19/18 takes precedence) - B60R 19/18: {characterised by the cross-section;} Means within the bumper to absorb impact - B62D 21/15: having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body (bumpers B60R19/02; shock absorbers in general F16F) - B62D 25/08: Front or rear portions {(sub-frames for mounting engine or suspensions B62D21/11)} - F16F 7/003: {One-shot shock absorbers (using plastic deformation of members, e.g. using sacrificial, fibre-reinforced composite members F16F7/12)} - F16F 7/124: {characterised by their special construction from fibre-reinforced plastics} - B60R 2019/1806: {Structural beams therefor, e.g. shock-absorbing} - B60Y 2304/03: Reducing weight - F16F 2224/0241: Fibre-reinforced plastics [FRP] - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - 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) - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract An impact absorbing structure includes an impact absorbing member made of CFRP, and the impact absorbing member includes a pair of left and right side wall portions and upper and lower coupling wall portions each coupling the side wall portions. Each of the pair of side wall portions includes a plurality of curved portions. Each of the curved portions is formed such that a leftward/rightward direction depth thereof decreases toward a front side. Each of the pair of side wall portions includes: a plurality of first carbon fibers arranged to extend in a forward/rearward direction and constituting most of reinforced fibers contained in the side wall portion; and a plurality of second carbon fibers arranged to extend in a direction intersecting with the first carbon fibers. The plurality of second carbon fibers are arranged at both thickness direction end vicinity parts of each of the side wall portions. ## Claims ### Claim 1 An impact absorbing structure of a vehicle, the impact absorbing structure comprising an impact absorbing member made of fiber-reinforced resin, the impact absorbing member including a pair of left and right side wall portions and a coupling portion coupling the pair of side wall portions, the pair of left and right side wall portions being arranged at a vehicle body forward/rearward direction tip end-side part of the vehicle and each containing a plurality of reinforced fibers arranged so as to continuously extend in a vehicle body forward/rearward direction, wherein: each of the pair of side wall portions includes a plurality of concave and convex portions that are concave and convex in a vertical sectional view perpendicular to the forward/rearward direction and extend in a horizontal direction, a plurality of intermediate curved portions forming at least a part of the concave and convex portions, a bumper reinforcement being attached to tip end portions of the plurality of intermediate curved portions, and an upper curved portion continuous with an upper side of the plurality of intermediate curved portions, the upper curved portion having a substantially partial conical shape and a substantially partial circular-arc vertical section perpendicular to the forward/rearward direction; each of the plurality of concave and convex portions is formed such that a depth thereof in a vehicle width direction decreases toward a tip end portion of the vehicle; and the upper curved portion is formed such that a diameter thereof increases toward a base end of the upper curved portion. ### Claim 2 (depends on 1) The impact absorbing structure according to claim 1, wherein: each of the pair of side wall portions includes a plurality of first reinforced fibers arranged so as to continuously extend in the vehicle body forward/rearward direction and constituting most of the reinforced fibers contained in the side wall portion, and a plurality of second reinforced fibers arranged so as to continuously extend in a direction intersecting with the direction in which the first reinforced fibers extend; and the plurality of second reinforced fibers are provided at both thickness direction end vicinity parts of each of the side wall portions. ### Claim 3 (depends on 2) The impact absorbing structure according to claim 2, wherein each of the plurality of concave and convex portions is formed in a partial circular-arc shape or a curved shape. ### Claim 4 (depends on 3) The impact absorbing structure according to claim 3, wherein: each of the pair of side wall portions is formed such that an upper-lower width thereof decreases toward the tip end portion of the vehicle; and the plurality of concave and convex portions are provided substantially in parallel with one another in a side view. ### Claim 5 (depends on 4) The impact absorbing structure according to claim 4, wherein the coupling portion is configured such that a left-right width thereof increases toward a base end portion of the vehicle. ### Claim 6 (depends on 1) The impact absorbing structure according to claim 1, wherein: each of the pair of side wall portions is formed such that an upper-lower width thereof decreases toward the tip end portion of the vehicle; and the plurality of concave and convex portions are provided substantially in parallel with one another in a side view. ### Claim 7 (depends on 1) The impact absorbing structure according to claim 1, wherein the coupling portion is configured such that a left-right width thereof increases toward a base end portion of the vehicle.