# US 11,306,802 B2 · Traction device

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- Number: US 11,306,802 B2
- Document ID: US11306802B2
- Status: Granted
- Kind: B2
- Application number: 17/044,811
- Filed: 2019-04-02
- Published: 2021-04-01
- Granted: 2022-04-19
- Earliest claimed: 2018-04-02
- Assignees: Dana Corporation
- Applicants: Dana Limited
- Inventors: Jeffrey M. David; Daniel J. Dawe; Charles B. Lohr, III; Gordon M. McIndoe; Travis J. Miller; Sebastian J. Peters; Patrick R. Sexton
- Web page: https://patentgrep.com/patent/US11306802B2

## 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 15/50: Gearings providing a continuous range of gear ratios
- B60K 1/02: comprising more than one electric motor
- F16H 13/06: with members having orbital motion
- B60K 2001/001: {one motor mounted on a propulsion axle for rotating right and left wheels of this axle}
- B60Y 2400/73: Planetary gearings
- F16H 15/48: with members having orbital motion
- Y02T 10/62: Hybrid vehicles
- 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
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A traction device including a ring member, a carrier, and a sun member and an electric motor, wherein the electric motor is coupled to at least one of the ring member, the carrier, and the sun member.

## Claims

### Claim 1

A traction drive transmission, comprising:
a ring member having a rotational center aligned along a main axis of the transmission;
a first traction roller in contact with the ring member;
a sun member having a rotational center offset from the main axis, the sun member in contact with the first traction roller, the sun member located radially inward of the first traction roller;
a first floating traction roller in contact with the ring member and the sun member;
a first reaction roller in contact with the first floating traction roller;
a carrier configured to support the reaction roller, the carrier configured to be non-rotatable; and
a second reaction roller supported in the carrier.

### Claim 2 (depends on 1)

The traction drive transmission of claim 1, further comprising a second floating roller in contact with the second reaction roller.

### Claim 3

An electric powertrain, comprising:
a motor-generator;
a first traction drive transmission having a first ring member, a first non-rotatable traction planet carrier configured to support a plurality of traction rollers, and a first sun member coupled to the motor-generator;
a second traction drive transmission having a second ring member, a second non-rotatable traction planet carrier, and a second sun member coupled to the first ring member;
a first pinion gear having a hollow central bore, the first pinion gear coupled to the second ring member; and
a shaft coupled to the second sun member and the first ring member, the shaft passing through the hollow central bore.

### Claim 4 (depends on 3)

The electric powertrain of claim 3, further comprising a second pinion gear coupled to the first pinion gear, the second pinion gear configured to transmit rotational power.

### Claim 5 (depends on 3)

The electric powertrain of claim 3, wherein the plurality of traction rollers are conical in shape.

### Claim 6 (depends on 3)

The electric powertrain of claim 3, wherein the first pinion gear is positioned between the motor-generator and the second traction drive transmission.

### Claim 7 (depends on 3)

The electric powertrain of claim 3, wherein the first pinion gear is positioned between the first traction drive transmission and the second traction drive transmission.

### Claim 8

A traction drive transmission, comprising:
a ring member having a rotational center aligned along a main axis of the transmission;
a first traction roller in contact with the ring member;
a sun member having a rotational center offset from the main axis, the sun member in contact with the first traction roller, the sun member located radially inward of the first traction roller;
a first floating traction roller in contact with the ring member and the sun member;
a first reaction roller in contact with the first floating traction roller; and
a carrier configured to support the reaction roller, the carrier configured to be non-rotatable;
wherein the carrier is configured to support the first traction roller.

### Claim 9 (depends on 8)

The traction drive transmission of claim 8, further comprising a second reaction roller supported in the carrier.

### Claim 10 (depends on 9)

The traction drive transmission of claim 9, further comprising a second floating roller in contact with the second reaction roller.