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US 2025/0033738 A1Published application
Differential transmission method and powertrain for electrically-assisted bicycle
AssigneeE2 Drives SA
InventorsChristophe Stephan G. DELEVAL, Arthur Christophe D. DELEVAL, Aubain Benoit D. VERLÉ
Life of this patent
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Abstract
A method of assisted differential transmission for electric bicycle as well as the powertrain associated to this method, comprising two motors articulated around of a differential system comprising a ring gear having an inner surface and an element cooperating with this inner surface, the periphery of said element containing, at all times, the geometric center of the ring gear.
Claims25
A method of assisted differential transmission for electric bicycle comprising the following stages:
- an angular speed ω1 is applied by action of a first motor to a first inlet of a differential system;
- an angular speed ω2 is applied by an inlet body transmitting at least the action of a rider on a crankset to a second inlet of the differential system;
- the angular speeds ω1 and ω2 are combined in the differential system comprising a ring gear having an inner surface and an element cooperating with this inner surface, the periphery of said element containing, at all times, the geometric center of the ring gear, and transmitted to an outlet of the differential with an angular speed ω3;
- the speed ω3 is transmitted to an outlet body;
- a second motor regulating assistance to the rider being connected either to the second inlet in combination with the action of the rider through the inlet body, or to the outlet, and
- the axis of the outlet body, the main axis of the differential system, the axis of the first motor and the axis of the second motor being coincident and/or concentric with the axis of the inlet body.
3 more elements
A powertrain for electric bicycle comprising:
- a differential system comprising a ring gear having an inner surface and an element cooperating with this inner surface, the periphery of said element defining a surface containing the geometric center of the ring gear,
- a first motor arranged to impart an angular speed to a first inlet of the differential system,
- an inlet body arranged to impart an angular speed to a second inlet of the differential system,
- an outlet of the differential system arranged to impart a speed to an outlet body, and
- a second motor regulating assistance to the rider connected either to the second inlet in combination with the inlet body, or to the outlet,
- wherein the axis of the outlet body, the main axis of the differential system, the axis of the first motor and the axis of the second motor are coincident and/or concentric with the axis of the inlet body.
3 more elements
Dependencies are inferred from the claim text.