# US 10,309,507 B2 · Transmission arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,507 B2 - Document ID: US10309507B2 - Status: Granted - Kind: B2 - Application number: 15/517,551 - Filed: 2015-09-30 - Published: 2017-10-26 - Granted: 2019-06-04 - Earliest claimed: 2014-10-08 - Assignees: ZF Friedrichshafen AG - Applicants: ZF Friedrichshafen AG - Inventors: Stephan Scharr; Alexander Dusdal - Web page: https://patentgrep.com/patent/US10309507B2 ## CPC - B60K 1/00: Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) - F16H 37/082: {and additional planetary reduction gears} - B60K 17/046: {with planetary gearing having orbital motion} - B60K 17/16: of differential gearing - F16H 48/08: comprising bevel gears - F16H 48/40: characterised by features of the rotating cases - B60K 2001/001: {one motor mounted on a propulsion axle for rotating right and left wheels of this axle} - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - F16H: GEARING ## Abstract A transmission (GA) for an axle drive (1) of a motor vehicle includes a drive shaft (AN), two output shafts (AB1, AB2), at least four shafts (W1, W2, W3, W4), a differential, and two interconnected planetary gear sets (PS1, PS2). The drive shaft (AN) is a hollow shaft, and the drive shaft (AN) is coaxial with at least one of the two output shafts (AB1, AB2). The differential (D) is arranged, at least partly, within a cylindrical volume. An outer shell surface of the cylindrical volume is defined by an inner shell surface of a sun gear (SO2) of the second planetary gear set (PS2). A diameter of inner shell surface corresponds to an inner diameter of the sun gear (SO2) of the second planetary gear set (PS2). ## Claims ### Claim 1 A transmission (GA) for an axle drive (1) of a motor vehicle, comprising: a drive shaft (AN); two output shafts (AB1, AB2); at least four shafts (W1, W2, W3, W4); a differential; and two interconnected planetary gear sets (PS1, PS2), the first planetary gear set (PS1) comprising a sun gear (SO1), a planetary carrier (ST1) and a ring gear (HO1), the second planetary gear set (PS2) also comprising a sun gear (SO2), a planetary carrier (ST2) and a ring gear (HO2), wherein the drive shaft (AN) is a hollow shaft, the drive shaft (AN) positioned coaxial with at least one of the two output shafts (AB1, AB2), wherein the differential (D) is arranged, at least partly, within a cylindrical volume, an outer shell surface of the cylindrical volume defined by an inner shell surface of the sun gear (SO2) of the second planetary gear set (PS2), a diameter of inner shell surface corresponding to an inner diameter of the sun gear (SO2) of the second planetary gear set (PS2), and wherein the ring gear (HO1) of the first planetary gear set (PS1) is non-rotatably fixed by a second shaft (W2) of the at least four shafts (W1, W2, W3, W4), and the ring gear (HO2) of the second planetary gear set (PS2) is non-rotatably fixed by a third shaft (W3) of the at least four shafts (W1, W2, W3, W4). ### Claim 2 (depends on 1) The transmission of claim 1, wherein the planetary carrier (ST1) of the first planetary gear set (PS1) is in operative connection with the sun gear (SO2) of the second planetary gear set (PS2) by a first shaft (W1) of the at least four shafts (W1, W2, W3, W4). ### Claim 3 (depends on 1) The transmission of claim 1, wherein the planetary carrier (ST2) of the second planetary gear set (PS2) is in operative connection with the differential (D) by a fourth shaft (W4) of the at least four shafts (W1, W2, W3, W4). ### Claim 4 (depends on 1) The transmission of claim 1, wherein the differential (D) is a two-element bevel gear differential (2), a differential cage of the two-element bevel gear differential (2) comprising a first differential cage element (DK1) and a second differential cage element (DK2), the second differential cage element (DK2) connectable to the first differential cage element (DK1), the two-element bevel gear differential (2) positioned coaxial with the drive shaft (AN) on an axis of rotation of the drive shaft (AN). ### Claim 5 (depends on 4) The transmission of claim 4, wherein the differential (D) is supported by a fixed-floating bearing layout through a fixed bearing (L1) and a floating bearing (L2). ### Claim 6 (depends on 5) The transmission of claim 5, wherein the fixed bearing (L1) is arranged on the first differential cage element (DK1) between a housing (G) that substantially encloses the axle drive (1) and the first differential cage element (DK1), the floating bearing (L2) guided on the housing (G) by the planetary carrier (ST2) of the second planetary gear set (PS2). ### Claim 7 (depends on 1) An axle drive (1) for a motor vehicle, comprising the transmission (GA) of claim 1, wherein the transmission (GA) is in operative connection with a drive source. ### Claim 8 (depends on 7) The axle drive (1) of claim 7, wherein the drive shaft (AN) connects the sun gear (SO1) of the first planetary gear set (PS1) with the drive source. ### Claim 9 (depends on 7) The axle drive (1) of claim 7, wherein a shifting element is arranged between the drive source and the sun gear (SO1) of the first planetary gear set (PS1) such that the sun gear (SO1) of the first planetary gear set (PS1) and the drive source are selectively connectable with the shifting element. ### Claim 10 (depends on 7) The axle drive (1) of claim 7, wherein the drive source is an internal combustion engine. ### Claim 11 (depends on 7) The axle drive (1) of claim 7, wherein the drive source is an electric motor. ### Claim 12 (depends on 11) The axle drive (1) of claim 11, wherein the drive shaft (AN) and the first output shaft (AB1) are positioned within an additional cylindrical volume, an outer shell surface of the additional cylindrical volume defined by an inner shell surface of the electric motor (EM), a diameter of the inner shell surface of the electric motor (EM) corresponding to an internal diameter of a rotor or a stator of the electric motor (EM). ### Claim 13 (depends on 11) The axle drive (1) of claim 11, wherein the electric motor (EM) is formed as an asynchronous induction electric motor, as a permanent-magnet synchronous motor, or as a hybrid synchronous motor. ### Claim 14 (depends on 11) The axle drive (1) of claim 11, wherein the electric motor (EM) is selectively operable as either as a motor or as a generator.