# US 2024/0200637 A1 · Transmission for a Vehicle, and Power Train Having Such a Transmission

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- Number: US 2024/0200637 A1
- Document ID: US20240200637A1
- Status: Published application
- Kind: A1
- Application number: 18/543,557
- Filed: 2023-12-18
- Published: 2024-06-20
- Earliest claimed: 2022-12-19
- Assignees: ZF Friedrichshafen AG
- Applicants: ZF Friedrichshafen AG
- Inventors: Philip Dötschel; Tamas Gyarmati; Matthias Reisch
- Web page: https://patentgrep.com/patent/US20240200637A1

## CPC

- F16H 3/666: {with intermeshing orbital gears (F16H3/663 takes precedence)}
- F16H 48/10: with orbital spur gears
- 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 57/082: {Planet carriers}
- B60K 2001/001: {one motor mounted on a propulsion axle for rotating right and left wheels of this axle}
- F16H 2048/104: {characterised by two ring gears}
- F16H 2048/106: {characterised by two sun gears}
- F16H 2200/2007: with two sets of orbital gears
- F16H: GEARING
- 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

## Abstract

A transmission includes an input shaft, two output shafts, at least three bearings and a differential. A first planetary gear set includes multiple gear set elements, and a second planetary gear set includes multiple gear set elements and is operatively connected to the first planetary gear set. A first output torque is at least indirectly transmittable onto the first output shaft by the first planetary gear set. One of the three bearings is arranged between the second output shaft and a stationary component and delimits the axial position of the second output shaft with respect to the stationary component at least in one axial direction. The second gear set element of the first planetary gear set is axially fixed at least in one axial direction on the first output shaft.

## Claims

### Claim at position 1

1-15: (canceled)

### Claim 16

A transmission (3) for a power train (2) of a vehicle (1), comprising:
an input shaft (4);
a first output shaft (5);
a second output shaft (6);
a first bearing (L1);
a second bearing (L2);
a third bearing (L5); and
a differential (7) operatively arranged between the input shaft (4) and the two output shafts (5, 6), the differential (7) comprising a first planetary gear set (8) and a second planetary gear set (9), the first planetary gear set (8) comprising a first gear set element, a second gear set element, and a third gear set element, a first output torque being at least indirectly transmittable onto the first output shaft (5) by the first planetary gear set (8), the second planetary gear set (9) comprising a first gear set element, a second gear set element, and a third gear set element, the second planetary gear set (9) operatively connected to the first planetary gear set (8), a support torque of the first planetary gear set (8) being convertible in the second planetary gear set (9) such that a second output torque corresponding to the first output torque is transmittable onto the second output shaft (6),
wherein the first gear set element of the first planetary gear set (8) is connected to the input shaft (4) for conjoint rotation, the second gear set element of the first planetary gear set (8) is at least indirectly connected to the first output shaft (5) for conjoint rotation, and the third gear set element of the first planetary gear set (8) is at least indirectly connected to the first gear set element of the second planetary gear set (9) for conjoint rotation, the second gear set element of the second planetary gear set (9) is connected to a stationary component (13) for conjoint rotation, and the third gear set element of the second planetary gear set (9) is at least indirectly connected to the second output shaft (6) for conjoint rotation,
wherein the second bearing (L2) is arranged between the second output shaft (6) and the stationary component (13) and delimits the axial position of the second output shaft (6) with respect to the stationary component (13) at least in one axial direction, and
wherein the second gear set element of the first planetary gear set (8) is axially fixed at least in one axial direction on the first output shaft (5).

### Claim 17 (depends on 16)

The transmission (3) of claim 16, wherein one or both of:
the input shaft (4) is mounted for rotation with respect to the stationary component (13) by the first bearing (L1); and
the first output shaft (5) is mounted for rotation with respect to the stationary component (13) by the third bearing (L5).

### Claim 18 (depends on 16)

The transmission (3) of claim 16, wherein the first planetary gear set (8) is arranged at least partially, radially inside the second planetary gear set (9).

### Claim 19 (depends on 16)

The transmission (3) of claim 16, wherein the third gear set element of the second planetary gear set (9) is connected to the second output shaft (6) for conjoint rotation via a coupling element (10).

### Claim 20 (depends on 16)

The transmission (3) of claim 16, further comprising a radial bearing (L3), the second gear set element of the first planetary gear set (8) mounted via the radial bearing (L3) for rotation at least indirectly with respect to the second output shaft (6).

### Claim 21 (depends on 16)

The transmission (3) of claim 16, further comprising a snap ring (31) axially fixing the second gear set element of the first planetary gear set (8), the snap ring (31) arranged radially between the second gear set element of the first planetary gear set (8) and the first output shaft (5).

### Claim 22 (depends on 16)

The transmission (3) of claim 16, further comprising at least one retaining ring (32, 33), the second gear set element of the first planetary gear set (8) axially fixed on the first output shaft (5) by the at least one retaining ring (32, 33).

### Claim 23 (depends on 22)

The transmission (3) of claim 22, wherein a first retaining ring (32) of the at least one retaining ring (32, 33) is accommodated in a first groove (34) formed on the first output shaft (5), and the second gear set element of the first planetary gear set (8) is axially supported against the first retaining ring (32).

### Claim 24 (depends on 22)

The transmission (3) of claim 22, wherein a second retaining ring (33) of the at least one retaining ring (32, 33) is accommodated in a second groove (35) formed on the second gear set element of the first planetary gear set (8), and the second gear set element of the first planetary gear set (8) is supported axially against the first output shaft (5) via the second retaining ring (33).

### Claim 25 (depends on 16)

The transmission (3) of claim 16, wherein an at least partially circumferential first shoulder (19) is formed on the first output shaft (5), and the second gear set element of the first planetary gear set (8) is axially supported against the first shoulder (19) of the first output shaft (5).

### Claim 26 (depends on 16)

The transmission (3) of claim 16, wherein an at least partially circumferential second shoulder (20) is formed on the second gear set element of the first planetary gear set (8), and an end face of the second shoulder (20) rests against the first output shaft (5).

### Claim 27 (depends on 16)

The transmission (3) of claim 16, wherein an at least partially circumferential third shoulder (23) is formed on the second gear set element of the first planetary gear set (8), and an end face of the third shoulder (23) at least indirectly rest against the second output shaft (6).

### Claim 28 (depends on 16)

The transmission (3) of claim 16, wherein the first gear set element of each of the first and second planetary gear sets (8, 9) is a respective sun gear, the second gear set element of each of the first and second planetary gear sets (8, 9) is a respective planet carrier, and the third gear set element of each of the first and second planetary gear sets (8, 9) is a respective ring gear.

### Claim 29 (depends on 16)

The transmission (3) of claim 16, wherein each of the first and second planetary gear sets (8, 9) is either a negative planetary gear set or a positive planetary gear set.

### Claim 30 (depends on 16)

A power train (2) for a vehicle (1), comprising the transmission (3) of claim 16.