# US 2019/0316664 A1 · Range-change transmission device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0316664 A1 - Document ID: US20190316664A1 - Status: Published application - Kind: A1 - Application number: 16/472,535 - Filed: 2017-09-18 - Published: 2019-10-17 - Earliest claimed: 2016-12-22 - Assignees: Daimler AG - Applicants: Daimler AG - Inventors: Ingo PFANNKUCHEN; Detlef SCHNITZER; Frank STEFFENS; Jens LUCKMANN - Web page: https://patentgrep.com/patent/US20190316664A1 ## CPC - F16H 37/046: {with an additional planetary gear train, e.g. creep gear, overdrive} - F16H 3/54: one of the central gears being internally toothed and the other externally toothed - F16H 2200/0039: the gear ratios comprising three forward speeds - F16H 2200/2005: with one sets of orbital gears - F16H 2200/2046: with six engaging means - F16H 2200/2064: using at least one positive clutch, e.g. dog clutch - F16H 2200/2094: using positive clutches, e.g. dog clutches - F16H: GEARING ## Abstract A range-change transmission device includes a main shaft, an output shaft, and a range-change unit. The range-change unit has at least one planetary gearbox, which includes at least one first gearbox element, at least one second gearbox element, and at least one third gearbox element. The range-change unit also has at least one shifting device, which is provided at least for the selective connection of the main shaft to the first gearbox element and/or to the second gearbox element. ## Claims ### Claim at position 1 1-16. (canceled) ### Claim 17 A range-change transmission device, comprising: a main shaft; an output shaft arranged coaxially with respect to the main shaft; and a range group, comprising at least one planetary transmission comprising at least one first transmission element, at least one second transmission element and at least one third transmission element; and at least one shifting device configured to at least connect the main shaft to the first transmission element or to the second transmission element, the at least one shifting device comprising at least one shifting unit which, in a first shifting state, is configured to connect the main shaft to the second transmission element and/or, in a second shifting state, is configured to connect the output shaft to the second transmission element; and at least one further shifting unit which, in a first shifting state, is configured to connect the output shaft to the third transmission element, wherein at least one shifting state of the at least one shifting unit is coupled to at least one shifting state of the at least one further shifting unit. ### Claim 18 (depends on 17) The range-change transmission device of claim 17, wherein the at least one shifting device is configured to connect the output shaft to the second transmission element or to the third transmission element. ### Claim 19 (depends on 17) The range-change transmission device of claim 17, wherein the at least one further shifting unit, in a second shifting state, is configured to fix the third transmission element. ### Claim 20 (depends on 17) The range-change transmission device of claim 17, wherein the at least one shifting unit is connected to the at least one further shifting unit so as to be axially fixed. ### Claim 21 (depends on 17) The range-change transmission device of claim 17, wherein the at least one shifting unit of the shifting device is configured to at least for a form-fit shift. ### Claim 22 (depends on 17) The range-change transmission device of claim 17, wherein at least one of the second and third transmission elements is configured to be moved axially by at least one shifting unit. ### Claim 23 (depends on 17) The range-change transmission device of claim 17, wherein the at least one shifting device has at least one additional shifting unit which, in a first shifting state, is configured to connect the main shaft to the first transmission element and/or, in a second shifting state, is configured to fix the first transmission element. ### Claim 24 (depends on 17) The range-change transmission device of claim 17, wherein the first transmission element is a sun wheel. ### Claim 25 (depends on 17) The range-change transmission device of claim 17, wherein the second transmission element is a planet carrier. ### Claim 26 (depends on 17) The range-change transmission device of claim 17, wherein the third transmission element is a ring gear. ### Claim 27 (depends on 17) The range-change transmission device of claim 17, wherein the range group has at least one first gearwheel plane arranged on a drive side relative to a planetary gear set of the at least one planetary transmission and which is configured to connect the third transmission element so as to be fixed to a housing. ### Claim 28 (depends on 27) The range-change transmission device of claim 27, wherein the range group has at least one second gearwheel plane arranged on an output side relative to a planetary gear set of the at least one planetary transmission and which is configured to connect the second transmission element to the main shaft for conjoint rotation. ### Claim 29 (depends on 28) The range-change transmission device of claim 28, wherein the range group has at least one third gearwheel plane arranged on the output side relative to a planetary gear set of the at least one planetary transmission and which is configured to connect the second transmission element to the output shaft for conjoint rotation. ### Claim 30 (depends on 29) The range-change transmission device of claim 29, wherein the range group has at least one fourth gearwheel plane arranged on the output side relative to a planetary gear set of the planetary transmission and which is configured to connect the third transmission element to the output shaft for conjoint rotation. ### Claim 31 A method for operating a range-change transmission device, which comprises a main shaft; an output shaft arranged coaxially with respect to the main shaft; and a range group, comprising at least one planetary transmission comprising at least one first transmission element, at least one second transmission element and at least one third transmission element; and at least one shifting device configured to at least connect the main shaft to the first transmission element or to the second transmission element, the at least one shifting device comprising at least one shifting unit which, in a first shifting state, is configured to connect the main shaft to the second transmission element and/or, in a second shifting state, is configured to connect the output shaft to the second transmission element; and at least one further shifting unit which, in a first shifting state, is configured to connect the output shaft to the third transmission element, wherein at least one shifting state of the at least one shifting unit is coupled to at least one shifting state of the at least one further shifting unit, the method comprising: forming a slow gear by coupling the output shaft to the second transmission element using the at least one shifting unit and by fixing the third transmission element using the at least one shifting unit and by coupling the main shaft to the first transmission element using the at least one additional shifting unit. ### Claim 32 (depends on 31) The method for operating a range-change transmission device of claim 31, the method further comprising: forming a fast gear by coupling the main shaft to the second transmission element using the at least one shifting unit and by coupling the output shaft to the third transmission element using the at least one further shifting unit and by braking the first transmission element using the at least one additional shifting unit.