Hybrid tractor truck

A method of retrofitting hybrid capacity to a tractor truck having a cabin supported by a frame, the frame including two transversally spaced apart beams extending behind the cabin to corresponding rear ends, a fifth wheel supported by the frame behind the cabin, a front axle bearing front wheels, at least one rear axle supported by the frame behind the cabin, the at least one rear axle bearing rear wheels, a heat engine located in an engine compartment supported by the frame in front of the cabin, the heat engine drivingly connected to said at least one rear axle;

• the method comprising:
• Assembling a beam extender to the rear end of each one of the beams, the beam extenders extending rearwardly from the beams;
• Securing an electric machine to the beam extenders;
• Drivingly connecting the electric machine to the at least one rear axle;
• Mounting at least one battery to the tractor truck, and
• Electrically connecting the at least one battery to the electric machine.

A hybrid tractor truck having a cabin supported by a frame, the frame including two transversally spaced apart beams extending behind the cabin, a fifth wheel supported by the frame behind the cabin, a front axle bearing front wheels, at least one rear axle supported by the frame behind the cabin, the at least one rear axle bearing rear wheels, a heat engine located in an engine compartment supported by the frame in front of the cabin, the heat engine drivingly connected to said at least one rear axle;

• and an electric machine supported by the frame behind the at least one rear axle, the electric machine being drivingly connected to the at least one rear axle, and at least one battery electrically connected to the electric machine;
• wherein the at least one rear axle is two rear axles, including a first rear axle and a second rear axle;
• wherein the first rear axle has a first differential drivingly connected to the heat engine via a primary shaft, and connected to the corresponding wheels via transversal shafts and planetary gearing, the second rear axle has a second differential connected to the primary shaft via the first differential and connected to the corresponding wheels via a other transversal shafts and planetary gearing, wherein the electric machine is connected to the second differential via a tertiary shaft, the tertiary shaft being connected to the secondary shaft via the second differential.