# US 10,309,493 B2 · Multi-stage transmission for vehicles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,493 B2 - Document ID: US10309493B2 - Status: Granted - Kind: B2 - Application number: 15/825,585 - Filed: 2017-11-29 - Published: 2019-03-21 - Granted: 2019-06-04 - Earliest claimed: 2017-09-18 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Hyun Sik Kwon; Seong Wook Ji; Ju Hyeon Park; Il Han Yoo; Seong Wook Hwang; Ki Tae Kim - Web page: https://patentgrep.com/patent/US10309493B2 ## CPC - F16H 3/66: composed of a number of gear trains without drive passing from one train to another - F16H 3/666: {with intermeshing orbital gears (F16H3/663 takes precedence)} - F16H 2003/445: {without permanent connection between the input and the set of orbital gears} - F16H 2200/0069: the gear ratios comprising ten forward speeds - F16H 2200/2012: with four sets of orbital gears - F16H 2200/2046: with six engaging means - F16H: GEARING ## Abstract A multi-stage transmission includes an input shaft, an output shaft, a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set. Each planetary gear set includes three rotating elements. Six shifting elements are connected to the rotating elements of the first, the second, the third and the fourth planetary gear sets. A first rotating element of the first planetary gear set is fixedly connected to a first rotating element of the second planetary gear set and a second rotating element of the third planetary gear set and is selectively connected to the input shaft. A second rotating element thereof is fixedly connected to a third rotating element of the third planetary gear set and a third rotating element of the fourth planetary gear set. A third rotating element thereof is selectively connected to the input shaft. ## Claims ### Claim 1 A multi-stage transmission for a vehicle, the multi-stage transmission comprising: an input shaft and an output shaft; a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set provided between the input shaft and the output shaft to transfer a torque, each of the first to fourth planetary gear sets includes three rotating elements; and six shifting elements connected to the rotating elements of the first, the second, the third, and the fourth planetary gear sets, wherein a first rotating element of the first planetary gear set is fixedly connected to a first rotating element of the second planetary gear set and a second rotating element of the third planetary gear set, wherein a second rotating element of the first planetary gear set is fixedly connected to a third rotating element of the third planetary gear set and a third rotating element of the fourth planetary gear set, wherein a third rotating element of the second planetary gear set is fixedly connected to a first rotating element of the third planetary gear set, and wherein a second rotating element of the fourth planetary gear set is fixedly connected to the output shaft. ### Claim 2 (depends on 1) The multi-stage transmission of claim 1, wherein the first rotating element of the first planetary gear set is fixedly connected to the input shaft and a third rotating element thereof is fixedly connected to the input shaft, wherein the second rotating element of the second planetary gear set is fixedly provided in a transmission casing by one element of the six shifting elements and the third rotating element thereof is fixedly connected to a first rotating element and the second rotating element of the fourth planetary gear set, and wherein a first rotating element of the fourth planetary gear set is fixedly provided in the transmission casing by another element of the six shifting elements. ### Claim 3 (depends on 2) The multi-stage transmission of claim 2, wherein the first planetary gear set, the second planetary gear set, the third planetary gear set, and the fourth planetary gear set are sequentially arranged in an axial direction from the input shaft toward the output shaft, and wherein each of the first planetary gear set, the second planetary gear set, and the fourth planetary gear set is a single pinion simple planetary gear set and the third planetary gear set is a double pinion simple planetary gear set. ### Claim 4 (depends on 2) The multi-stage transmission of claim 2, wherein the second rotating element of the second planetary gear set is fixedly provided in the transmission casing by a first brake of the six shifting elements, and wherein the first rotating element of the fourth planetary gear set is fixedly provided in the transmission casing by a second brake of the six shifting elements. ### Claim 5 (depends on 4) The multi-stage transmission of claim 4, wherein the first rotating element, the first planetary gear set, and the input shaft are selectively connected to each other by a first clutch of the six shifting elements, wherein a third rotating element of the first planetary gear set and the input shaft are selectively connected to each other by a second clutch of the six shifting elements, wherein the third rotating element of the second planetary gear set and the first rotating element of the fourth planetary gear set are selectively connected to each other by a third clutch of the six shifting elements, and wherein the third rotating element of the second planetary gear set and the second rotating element of the fourth planetary gear set are selectively connected to each other by a fourth clutch of the six shifting elements. ### Claim 6 A multi-stage transmission for a vehicle, the multi-stage transmission comprising: a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set, each includes three rotating elements; six shifting elements configured to selectively connect rotation shafts thereto; and eight rotation shafts connected to the rotating elements of the first, the second, the third, and the fourth planetary gear sets, wherein a first rotation shaft is an input shaft, wherein a second rotation shaft is fixedly connected to a first rotating element of the first planetary gear set, a first rotating element of the second planetary gear set, and a second rotating element of the third planetary gear set, wherein a third rotation shaft is fixedly connected to a second rotating element of the first planetary gear set, a third rotating element of the third planetary gear set, and a third rotating element of the fourth planetary gear set, wherein a fourth rotation shaft is fixedly connected to a third rotating element of the first planetary gear set, wherein a fifth rotation shaft is fixedly connected to a second rotating element of the second planetary gear set, wherein a sixth rotation shaft is fixedly connected to a third rotating element of the second planetary gear set and a first rotating element of the third planetary gear set, wherein a seventh rotation shaft is fixedly connected to a first rotating element of the fourth planetary gear set, and wherein an eighth rotation shaft is an output shaft fixedly connected to a second rotating element of the fourth planetary gear set. ### Claim 7 (depends on 6) The multi-stage transmission of claim 6, wherein the first planetary gear set, the second planetary gear set, the third planetary gear set, and the fourth planetary gear set are sequentially arranged in an axial direction from the input shaft toward the output shaft, and wherein the third planetary gear set is a double pinion simple planetary gear set. ### Claim 8 (depends on 6) The multi-stage transmission of claim 6, wherein of the six shifting elements, a first brake is provided between the fifth rotation shaft and a transmission casing, a second brake is provided between the seventh rotation shaft and the transmission casing, a first clutch is provided between the first rotation shaft and the second rotation shaft, a second clutch is provided between the first rotation shaft and the fourth rotation shaft, a third clutch is provided between the sixth rotation shaft and the seventh rotation shaft, and a fourth clutch is provided between the sixth rotation shaft and the eighth rotation shaft.