Power transmission system for a work machine

A power transmission system (100) for a work machine (50), the work machine (50) defined by drive wheels (14) for driving the work machine (50) and a power take off (PTO) shaft (18) for driving a plurality of implements attached to the work machine (50), said system (100) configured to provide on demand additional driving power to said PTO shaft (18), said system (100) comprising:

• a first prime mover (10) configured to engage a first shaft (12) and further configured to drive the drive wheels (14) of the work machine (50);
• a second prime mover (16), configured to engage said power take off (PTO) shaft (18) of the work machine (50) to drive the plurality of implements;
• a first gear (20) mounted on said first shaft (12);
• a second gear (22), mounted on said PTO shaft (18), said first gear (20) configured to be engaged with said second gear (22), to thereby drive said second gear (22);
• an engaging unit (24), mounted on said PTO shaft (18), said engaging unit (24) configured to be controllably displaced from an idling configuration to an engaging configuration;
• an actuator (26), configured to be in communication with said engaging unit (24), wherein said engaging unit (24) is defined by a sleeve-hub arrangement, said hub (36a) is configured to be mounted on said PTO shaft (18), to enable said sleeve-hub arrangement to rotate with said PTO shaft (18), an inner surface of said sleeve (36b) is configured with a plurality of protrusions to slidably mesh with a plurality of grooves on an external surface of said hub (36a), an outer surface of said sleeve (36b) is configured with a circumferential groove (38) to receive and engage a fork (40) therein, said fork (40) is configured to engage with said actuator (26), and further configured to slide said sleeve (36b) on said hub (36a) based on actuation of said actuator (26);
• and
• a switch, configured to control the displacement of said engaging unit (24).