Drawbar (haulage)

Agriculture and Horse-Drawn Vehicles:
– Agricultural equipment hauled by tractor-mounted drawbar
– Specialist tools like ploughs attached to specialized drawbars
– Fergusons development of the three-point linkage in TE20 revolutionized the industry
– Wooden drawbar extends from front of horse-drawn vehicles
– Steel drawbar attaches farm implement to tractor

Road:
– Drawbar serves as towing or pushing connection between vehicle and load

Light Vehicles:
– Common coupling is A-frame drawbar with 1 7/8 inch or 50mm tow ball
– Drawbars transmit around 10% of gross trailer weight through coupling

Heavy Vehicles:
– Haulage direction may be push or pull
– A-frame drawbar at front of full trailer is common configuration
– Drawbar eye, typically 40mm or 50mm, connected to bolt and pin coupling
– Brands like Ringfeder, V. Orlandi, and Jost Rockinger are common
– Drawbars transmit little or no downwards force through coupling

Drawbar Eye:
– Mechanical part to connect trailer/dolly to tractor via drawbar coupling
– Made from high tension material to bear heavy loads
– Shape of an “i” with hole at top for drawbar coupling
– Essential connector for heavy transport operations
– Used in agriculture, construction, road trains, and more