# US 11,299,224 B2 · Three-row wheel vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,224 B2 - Document ID: US11299224B2 - Status: Granted - Kind: B2 - Application number: 17/198,598 - Filed: 2021-03-11 - Published: 2021-09-16 - Granted: 2022-04-12 - Earliest claimed: 2020-03-13 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Hiroshi Isono - Web page: https://patentgrep.com/patent/US11299224B2 ## CPC - B62D 61/125: {the retractable wheel being a part of a set of tandem wheels (resilient suspension for a single set of tandem wheels B60G5/00)} - B60G 5/00: Resilient suspensions for a set of tandem wheels or axles having interrelated movements - B60G 5/01: the set being characterised by having more than two successive axles - B60G 5/04: with two or more pivoted arms, the movements of which are resiliently interrelated {, e.g. the arms being rigid} - B62D 61/10: with more than four wheels {(tractors of the low ground pressure type B62D49/002)} - 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) - B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00}) ## Abstract A three-row wheel vehicle having front, center and rear wheels has laterally spaced leading arms each pivotably connected to a vehicle body, laterally spaced swing arms each connected to the front end of the leading arm swingably in the front and rear direction and rotatably supporting the front wheel at the lower end, and laterally spaced connecting links each attached at one end to the swing arm pivotably around an axis and attached at the other end to the vehicle body pivotably around another axis; heights of the axes are different when the vehicle is on a horizontal flat traveling road; and each connecting link is arranged to apply a reaction force including an upward component to the swing arm when a rearward force acts from the front wheel to the one end via the swing arm. ## Claims ### Claim 1 A three-row wheel vehicle having a front wheel group, a center wheel group and a rear wheel group that are arranged in a front-rear direction of the three-row wheel vehicle, and at least one of the front wheel group, the center wheel group and the rear wheel group includes a pair of laterally spaced wheels, wherein the three-row wheel vehicle has a pair of laterally spaced leading arms, a pair of laterally spaced swing arms and a pair of laterally spaced connecting links, each leading arm is connected at a rear end portion to a vehicle body so as to pivot in a vertical direction around a first lateral pivot axis; each swing arm is connected to a front end portion of the leading arm so as to swing in the front-rear direction around a second lateral pivot axis and rotatably supports the corresponding wheel of the front wheel group at a lower end portion; and each connecting link is attached at one end to the swing arm so as to pivot around a third lateral pivot axis and is attached at the other end to the vehicle body so as to pivot around a fourth lateral pivot axis: and heights of the third and fourth lateral pivot axes are different from each other when the three-row wheel vehicle is on a horizontal flat traveling road, and each connecting link is arranged to apply a reaction force including an upward component to the swing arm when a rearward force acts from the corresponding wheel of the front wheel group to the one end via the swing arm, wherein the third lateral pivot axis is located below the second lateral pivot axis, and the fourth lateral pivot axis is located behind and below the third lateral pivot axis when the three-row wheel vehicle is on the horizontal flat traveling road. ### Claim 2 (depends on 1) The three-row wheel vehicle according to claim 1, wherein each leading arm supports the corresponding wheel of the center wheel group rotatably around a rotation axis at a position below the first lateral pivot axis. ### Claim 3 (depends on 2) The three-row wheel vehicle according to claim 2, wherein each rotation axis of the corresponding wheel of the center wheel group is located directly below the first lateral pivot axis when the three-row wheel vehicle is on the horizontal flat traveling road. ### Claim 4 A three-row wheel vehicle having a front wheel group, a center wheel group and a rear wheel group that are arranged in a front-rear direction of the three-row wheel vehicle, and at least one of the front wheel group, the center wheel group and the rear wheel group includes a pair of laterally spaced wheels, wherein the three-row wheel vehicle has a pair of laterally spaced leading arms, a pair of laterally spaced swing arms and a pair of laterally spaced connecting links, each leading arm is connected at a rear end portion to a vehicle body so as to pivot in a vertical direction around a first lateral pivot axis; each swing arm is connected to a front end portion of the leading arm so as to swing in the front-rear direction around a second lateral pivot axis and rotatably supports the corresponding wheel of the front wheel group at a lower end portion; and each connecting link is attached at one end to the swing arm so as to pivot around a third lateral pivot axis and is attached at the other end to the vehicle body so as to pivot around a fourth lateral pivot axis: and heights of the third and fourth lateral pivot axes are different from each other when the three-row wheel vehicle is on a horizontal flat traveling road, and each connecting link is arranged to apply a reaction force including an upward component to the swing arm when a rearward force acts from the corresponding wheel of the front wheel group to the one end via the swing arm, wherein the third lateral pivot axis is located below the second lateral pivot axis, and the fourth lateral pivot axis is located anterior to and above the third lateral pivot axis when the three-row wheel vehicle is on the horizontal flat traveling road. ### Claim 5 (depends on 4) The three-row wheel vehicle according to claim 4, wherein each leading arm supports the corresponding wheel of the center wheel group rotatably around a rotation axis at a position below the first lateral pivot axis. ### Claim 6 (depends on 5) The three-row wheel vehicle according to claim 5, wherein each rotation axis of the corresponding wheel of the center wheel group is located directly below the first lateral pivot axis when the three-row wheel vehicle is on the horizontal flat traveling road.