| CPC F16H 1/22 (2013.01) [B60K 17/04 (2013.01); F16H 57/02 (2013.01); F16H 2057/02043 (2013.01)] | 6 Claims |
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1. A drivetrain for a vehicle, the drivetrain comprising:
a frame defining a central plane and a first half-space and a second half-space opposite to said first half-space with respect to said central plane; and
a first driving line and a second driving line supported by said frame and respectively comprising a first torque input element and a second torque input element, and a first torque output element and a second torque output element;
wherein the first driving line and the second driving line further comprise one or more intermediate elements adapted to transmit torque coming from the first torque input element or from the second torque input element towards the first torque output element or to the second torque output element and across the central plane;
wherein:
said first torque input element lying in the first half-space;
said first torque output element lying in the second half-space;
said second torque input element lying in the second half-space; and
said second torque output element lying in the first half-space;
wherein said one or more intermediate elements are cross-plane intermediate elements transferring a torque flow coming from the first torque input element or coming from the second torque input element respectively towards the first torque output element or towards the second torque output element;
wherein the cross-plane intermediate elements comprise a first intermediate element adapted to transfer a torque flow coming from the first torque input element towards the first torque output element, and a second intermediate element adapted to transfer a torque flow coming from the second torque input element towards the second torque output element;
wherein said first half-space and said second half-space are mutually opposite with respect to the central plane, such central plane being an ideal geometric plane or a material element, said material element comprising a plate-like element belonging to the frame;
wherein each of the first driving line and the second driving line further comprises:
a first driven attachment connected to said first torque input element or to said second torque input element or and connectable to an engine, said engine being an electric engine; and
a second driven attachment connected to said first torque output element or to said second torque output element and connectable to an axle or to a wheel;
wherein said cross-plane intermediate elements being kinematically connected to said first driven attachment and to the second driven attachment in order to define a predetermined overall transmission ratio;
wherein one or more of said first driven attachment, said second driven attachment and the cross-plane intermediate elements respectively comprise toothed or crowned gears, said toothed or crowned gears being supported by respective shafts, said shafts being rotationally supported along their respective axis by the frame and by the central plane;
wherein said shafts are placed within the frame in a mutually parallel relationship and are transverse, and perpendicular to the central plane, the shafts of the first driven attachment or of the second driven attachment being lying on and rotating around a respective common geometrical axis;
wherein the shafts of the cross-plane intermediate elements are mutually displaced, a projection of the shafts of the first driven attachment, of the second driven attachment and of the cross-plane intermediate elements on the central plane cooperatively defining an “L-shaped” laying pattern in the frame;
wherein each of the cross-plane intermediate elements comprises:
a first toothed or crowned gear residing in said first half-space or in said second half-space;
a cross-plane shaft protruding from said first toothed or crowned gear through the central plane; and
a second toothed or crowned gear residing in said second half-space or in said first half-space and supported by said cross-plane shaft;
wherein each of the first toothed or crowned gear also comprise an inner race supported by bearings;
wherein the drivetrain further comprises a predetermined number of bearings interposed between the frame or the central plane and the shafts of the first driven attachment or of the second driven attachment or of the cross-plane intermediate elements;
wherein the cross-plane intermediate elements, being directly supported by at least one housing directly located in the frame without any bearings located in the central plane and comprising bearings on portions of the frame away from the central plane;
wherein the shafts of the first driven attachment and of the second driven attachment are mutually facing each other in correspondence of the central plane of the frame;
wherein the shafts of the first driven attachment or the second driven attachment further comprise cross-plane protruding extremities which mutually compenetrate across the central plane of the frame, said cross-plane protruding extremities defining a shaft-in-shaft configuration for the shafts of the first driven attachment or of the second driven attachment.
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