The need for instrumental measurement of the traction force of the friction drive of the vertical spindles of the cotton harvesting machine

Abstract

An adhesion force measurement device was developed to measure the adhesion force of a friction drive in field conditions. The device consists of a lever with a pin, a dynamometer, and a hook. To measure the adhesion force, the car is stopped on a level area and the cleaning device is raised into the transport position. The movable section of the device is opened up to 30°. The selected spindle is brought closest to the opposite drum manually. The beginning of the serrated tape is inserted into the slot of the spindle rod and bent along the screw shell. A small gap is formed between the surface of the spindle rod and the bent section of the tape, allowing for insertion of the lever pin. When force is applied to turn the lever, it will either form a rigid connection with the spindle or slip along the surface of the belts, depending on whether or not maximum adhesion force has been reached. The dynamometer measures and displays the adhesion force on a certain scale. By knowing the lever arm from the stop to the pull cord and measuring angle between them, calculations can be made to determine adhesion force.