# US 12,759,441 B2 · Vibration isolation structure applied between upper and lower seat frames for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,441 B2 - Document ID: US12759441B2 - Status: Granted - Kind: B2 - Application number: 18/080,571 - Filed: 2022-12-13 - Published: 2024-01-04 - Granted: 2026-10-13 - Earliest claimed: 2022-07-04 - Assignees: Hyundai Motor Company; Kia Corporation; Das Co., Ltd - Applicants: Hyundai Motor Company; Kia Corporation; Das Co., Ltd - Inventors: Tae Su Kim; Min Hyuk Kwak; Hyun Ko; Du Go Jung; Jong Soon Lee; Hyun Gyu Jo; Ik Sang Oh - Web page: https://patentgrep.com/patent/US12759441B2 ## CPC - B60N 2/502: {attached to the base of the seat (B60N2/504 takes precedence)} - B60N 2/68: Seat frames - F16C 29/04: Ball or roller bearings - F16C 33/605: {with a separate retaining member, e.g. flange, shoulder, guide ring, secured to a race ring, adjacent to the race surface, so as to abut the end of the rolling elements, e.g. rollers, or the cage} - F16C 2326/08: Vehicle seats, e.g. in linear movable seats - B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS ## Abstract Provided is a vibration isolating apparatus for isolating vibration from being transferred from a vehicle to a seat during idling and traveling. The vibration isolating apparatus provides an isolation structure applied between the upper and lower seat frames for a vehicle. A bearing unit having a low friction characteristic are applied so that horizontal vibration is effectively isolated without an up-and-down motion. A damping unit capable of attenuating the motion and frictional noise is applied. ## Claims ### Claim 1 A vibration isolation structure for isolating vibration in a seat, the vibration isolation structure comprising: a lower assembly configured to fix a lower portion of a seat frame and fastened to a vehicle body; an upper assembly configured to fix an upper portion of the seat frame; a plate located below and apart from the lower assembly; and a bearing unit located between the upper assembly and the lower assembly and between the lower assembly and the plate, and configured to include bearings configured to carry out rotary motion and translational motion in a horizontal direction in response to vibration transmitted to the lower assembly, wherein the upper assembly, the bearing unit, the lower assembly, and the plate are coupled through a fastener without an up-and-down play. ### Claim 2 (depends on 1) The vibration isolation structure of claim 1, further comprising a damping unit disposed between the upper assembly and the lower assembly so as to attenuate flow noise and friction noise. ### Claim 3 (depends on 2) The vibration isolation structure of claim 2, wherein, when vibration is transmitted to the lower assembly and when the lower assembly is displaced within a preset displacement value, vibration energy transmitted to the lower assembly is converted into kinetic energy of the bearing unit. ### Claim 4 (depends on 2) The vibration isolation structure of claim 2, wherein, when vibration is transmitted to the lower assembly and thus the lower assembly is displaced in excess of a preset displacement value, the vibration energy transmitted to the lower assembly is converted into kinetic energy of the bearing unit, and the damping unit additionally attenuates the flow noise and the friction noise. ### Claim 5 (depends on 1) The vibration isolation structure of claim 1, wherein the bearing unit comprises: a plurality of upper rollers disposed between the upper assembly and the lower assembly so as to support the upper portion of the seat frame. ### Claim 6 (depends on 5) The vibration isolation structure of claim 5, wherein the bearing unit further comprises: an upper retainer configured to guide the plurality of upper rollers to be rotated with predetermined interval maintained. ### Claim 7 (depends on 6) The vibration isolation structure of claim 6, wherein the bearing unit further comprises: a plurality of lower rollers disposed between the lower assembly and the plate. ### Claim 8 (depends on 7) The vibration isolation structure of claim 7, wherein the plurality of lower rollers is configured to support the lower portion of the seat frame. ### Claim 9 (depends on 7) The vibration isolation structure of claim 7, wherein the bearing unit further comprises: a lower retainer configured to guide the plurality of lower rollers with predetermined interval maintained. ### Claim 10 (depends on 9) The vibration isolation structure of claim 9, wherein each of the upper retainer and the lower retainer further comprises an opening in which the fastener is located. ### Claim 11 (depends on 10) The vibration isolation structure of claim 10, wherein a cross-sectional area of the opening is larger than a cross-sectional area of the fastener. ### Claim 12 (depends on 7) The vibration isolation structure of claim 7, wherein each of the upper rollers and the lower rollers has a ball shape or a roller shape. ### Claim 13 (depends on 12) The vibration isolation structure of claim 12, wherein each of the upper rollers and the lower rollers has a ball shape, and the bearing unit is displaced in multiple directions. ### Claim 14 (depends on 12) The vibration isolation structure of claim 12, wherein each of the upper rollers and the lower rollers has a roller shape, and the bearing unit is displaced in a horizontal direction. ### Claim 15 (depends on 1) The vibration isolation structure of claim 1, wherein the fastener is made up of a bolt, a nut, or a rivet coupling structure. ### Claim 16 (depends on 1) The vibration isolation structure of claim 1, wherein the lower assembly is a leg assembly that fixes the lower portion of the seat frame. ### Claim 17 (depends on 1) The vibration isolation structure of claim 1, wherein the upper assembly is a cushion assembly that fixes the upper portion of the seat frame. ### Claim 18 (depends on 1) A vehicle comprising the vibration isolation structure of claim 1.