# US 7,461,710 B2 · Electric steering and drive system for a vehicle with wheel side steering system

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- Number: US 7,461,710 B2
- Document ID: US7461710B2
- Status: Granted
- Kind: B2
- Application number: 10/515,091
- Filed: 2003-05-17
- Published: 2005-12-29
- Granted: 2008-12-09
- Earliest claimed: 2002-05-21
- Assignees: RENK Aktiengesellschaft
- Inventors: Thomas Egen; Alexander Walter; Max Witzenberger
- Web page: https://patentgrep.com/patent/US7461710B2

## CPC

- B62D 11/04: by means of separate power sources
- B60K 1/02: comprising more than one electric motor
- B60L 7/12: for vehicles propelled by DC motors
- B60L 15/2009: {for braking}
- B60L 15/2036: {Electric differentials, e.g. for supporting steering vehicles}
- B60L 50/52: characterised by DC-motors
- B62D 11/16: the additional power supply being supplied mechanically
- B60L 2220/44: Wheel Hub motors, i.e. integrated in the wheel hub
- B60L 2220/46: Wheel motors, i.e. motor connected to only one wheel
- B60L 2240/421: Speed
- B60L 2240/423: Torque
- B60L 2260/28: Four wheel or all wheel drive
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/72: Electric energy management in electromobility
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)
- 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
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The invention relates to an electrical steering and drive system for a vehicle with wheel-based steering with at least two electrically driven axles, a mechanical coupling between the drive sides being provided on at least one driven axle in order to transmit power from one drive side to the other, and a purely electrical transmission of drive power being provided on the other driven axles.

## Claims

### Claim 1

An electrical steering and drive system for a vehicle with wheel-based steering having first and second drive sides, the system comprising:
at least two electrically driven axles;
a mechanical coupling between the drive sides being provided on at least one driven axle in order to transmit power from one drive side to the other; and
an electrical transmission of drive power on the other driven axles.

### Claim 2 (depends on 1)

The electrical steering and drive system according to claim 1, wherein the mechanical coupling comprises:
at least one differential gear mechanism;
a steering motor;
and a shaft.

### Claim 3 (depends on 1)

The electrical steering and drive system according to claim 1, wherein the electrical transmission of drive power is adapted to transmit steering power from one drive side to the other.

### Claim 4 (depends on 1)

The electrical steering and drive system according to claim 1 wherein both an electric driving motor and an electric steering motor are provided on the mechanical coupling.

### Claim 5 (depends on 2)

The electrical steering and drive system according to claim 2 wherein both an electric driving motor and an electric steering motor are provided on the mechanical coupling.

### Claim 6 (depends on 3)

The electrical steering and drive system according to claim 3 wherein both an electric driving motor and an electric steering motor are provided on the mechanical coupling.

### Claim 7 (depends on 1)

The electrical steering and drive system according to claim 1, wherein electric motors which are integrated into the wheel hub are provided on all the driven axles.

### Claim 8 (depends on 2)

The electrical steering and drive system according to claim 2, wherein electric motors which are integrated into the wheel hub are provided on all the driven axles.

### Claim 9 (depends on 3)

The electrical steering and drive system according to claim 3, wherein electric motors which are integrated into the wheel hub are provided on all the driven axles.

### Claim 10 (depends on 4)

The electrical steering and drive system according to claim 4, wherein electric motors which are integrated into the wheel hub are provided on all the driven axles.

### Claim 11 (depends on 5)

The electrical steering and drive system according to claim 5, wherein electric motors which are integrated into the wheel hub are provided on all the driven axles.

### Claim 12 (depends on 6)

The electrical steering and drive system according to claim 6, wherein electric motors which are integrated into the wheel hub are provided on all the driven axles.

### Claim 13 (depends on 1)

The electrical steering and drive system according to claim 1, wherein at least one element for distributing torque, to which a plurality of wheels of one side of the vehicle can be coupled, is provided on the mechanical coupling.

### Claim 14 (depends on 1)

The electrical steering and drive system according to claim 1, wherein at least one element for compensating for rotational speed, to which a plurality of wheels of one side of the vehicle can be coupled, is provided on the mechanical coupling.

### Claim 15 (depends on 2)

The electrical steering and drive system according to claim 2, wherein at least one element for distributing torque, to which a plurality of wheels of one side of the vehicle can be coupled, is provided on the mechanical coupling.

### Claim 16 (depends on 2)

The electrical steering and drive system according to claim 2, wherein at least one element for compensating for rotational speed, to which a plurality of wheels of one side of the vehicle can be coupled, is provided on the mechanical coupling.

### Claim 17 (depends on 3)

The electrical steering and drive system according to claim 3, wherein at least one element for distributing torque, to which a plurality of wheels of one side of the vehicle can be coupled, is provided on the mechanical coupling.

### Claim 18 (depends on 3)

The electrical steering and drive system according to claim 3, wherein at least one element for compensating for rotational speed, to which a plurality of wheels of one side of the vehicle can be coupled, is provided on the mechanical coupling.

### Claim 19 (depends on 1)

The electrical steering and drive system according to claim 1, wherein the vehicle is selected from the group consisting of a wheeled vehicle and a crawler vehicle.