Method and apparatus for an electric drive differential system
First Claim
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1. A differential assembly comprising;
- an electrically operated input device;
a first planetary assembly in direct driving engagement with said input device, said first planetary assembly directly driving a first output assembly;
a second planetary assembly in direct driving engagement with said first planetary assembly, said second planetary assembly directly driving a second output assembly;
wherein said input device, said first planetary assembly, and said second planetary assembly are drivingly connected in series, one after the other, to provide substantially the same torque to said first and second output assemblies,wherein said one of said first and second planetary assemblies includes a reduction ratio value one greater than the other of said first and said second planetary assemblies.
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Abstract
A differential assembly includes an electrically operated input device and a first planetary assembly in driving engagement with the input device. The first planetary assembly is drivingly connected to a first output assembly. A second planetary assembly is in driving engagement with the first planetary assembly and the second planetary assembly is drivingly connected to a second output assembly. The first planetary assembly co-acts with the second planetary assembly to provide substantially the same torque to the first and second output assemblies and the first and second planetary assemblies include axes of rotation substantially aligned with an axis of rotation of the input device.
36 Citations
23 Claims
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1. A differential assembly comprising;
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an electrically operated input device; a first planetary assembly in direct driving engagement with said input device, said first planetary assembly directly driving a first output assembly; a second planetary assembly in direct driving engagement with said first planetary assembly, said second planetary assembly directly driving a second output assembly; wherein said input device, said first planetary assembly, and said second planetary assembly are drivingly connected in series, one after the other, to provide substantially the same torque to said first and second output assemblies, wherein said one of said first and second planetary assemblies includes a reduction ratio value one greater than the other of said first and said second planetary assemblies.
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2. A differential assembly comprising;
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an electrically operated input device; a first planetary assembly in direct driving engagement with said input device, said first planetary assembly directly driving a first output assembly; a second planetary assembly in direct driving engagement with said first planetary assembly, said second planetary assembly directly driving a second output assembly; at least one brake assembly operable to reduce relative rotation of at least one of said first or said second output assemblies in response to a substantial rotational speed difference between said first and said second output assemblies, wherein said input device, said first planetary assembly, and said second planetary assembly are drivingly connected in series, one after the other, to provide substantially the same torque to said first and second output assemblies. - View Dependent Claims (3)
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4. A differential assembly comprising:
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an electrically operated input device; a first planetary assembly in direct driving engagement with said input device, said first planetary assembly directly driving a first output assembly; a second planetary assembly in direct driving engagement with said first planetary assembly, said second planetary assembly directly driving a second output assembly; wherein said input device, said first planetary assembly, and said second planetary assembly are drivingly connected in series, one after the other, to provide substantially the same torque to said first and second output assemblies, wherein at least one of said first output assembly or said second output assembly includes a final drive assembly.
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5. A differential assembly comprising:
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an electrically operated input device; a first planetary assembly in direct driving engagement with said input device, said first planetary assembly directly driving a first output assembly; a second planetary assembly in direct driving engagement with said first planetary assembly, said second planetary assembly directly driving a second output assembly; wherein said input device, said first planetary assembly, and said second planetary assembly are drivingly connected in series, one after the other, to provide substantially the same torque to said first and second output assemblies, wherein at least one of said first output assembly or said second output assembly includes a continuous track assembly.
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6. A differential assembly comprising:
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an electrically operated input device; a first planetary assembly in direct driving engagement with said input device, said first planetary assembly directly driving a first output assembly; a second planetary assembly in direct driving engagement with said first planetary assembly, said second planetary assembly directly driving a second output assembly; wherein said input device, said first planetary assembly, and said second planetary assembly are drivingly connected in series, one after the other, to provide substantially the same torque to said first and second output assemblies, wherein each of the first and second planetary assemblies include components comprising a sun gear, a planet gear set, a ring gear, and a carrier, wherein a hollow drive member is connected to the input device and drives the first planetary assembly, wherein the hollow drive member drives the ring gear of the first planetary assembly.
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7. A differential assembly comprising:
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an electrically operated input device; a first planetary assembly in direct driving engagement with said input device, said first planetary assembly directly driving a first output assembly; a second planetary assembly in direct driving engagement with said first planetary assembly, said second planetary assembly directly driving a second output assembly; wherein said input device, said first planetary assembly, and said second planetary assembly are drivingly connected in series, one after the other, to provide substantially the same torque to said first and second output assemblies, wherein each of the first and second planetary assemblies include components comprising a sun gear, a planet gear set, a ring gear, and a carrier, wherein a drive member is connected to the input device, the drive member driving the ring gear of the first planetary assembly which in turn drives a reaction member connected to the sun gears of the first and second planetary assemblies.
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8. A differential assembly, comprising:
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an electrically operated input device; no more than two planetary assemblies; the first planetary assembly in driving engagement with the input device, the first planetary assembly being drivingly connected to a first output assembly; a second planetary assembly in driving engagement with the first planetary assembly such that an output of the first planetary assembly delivers an input to the second planetary assembly, the second planetary assembly being drivingly connected to a second output assembly; wherein the input device, the first planetary assembly, and the second planetary assembly are drivingly connected in series, one after the other, to provide substantially the same torque to said first and second output assemblies. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification