Device for measuring static sliding friction coefficients of seeds on basis of tangent mechanism

The invention discloses a device for measuring static sliding friction coefficients of seeds on the basis of a tangent mechanism. A collecting box is arranged on the outer wall of a shell body, a first sliding groove and a second sliding groove are formed parallelly in the shell body, a motor rack is installed on a cylindrical boss, and a motor is arranged on the motor rack; a slidable first sliding strip is arranged in the first sliding groove, a slidable second sliding strip is arranged in the second sliding groove, and the two ends of a panel contact shaft are fixedly connected to the topsof the first sliding strip and second sliding strip respectively; a horizontal bearing is arranged on the lateral surface of the motor rack. A gear set includes a large gear and a small gear, a sliding block capable of moving along a swing rod sleeves the swinging rod, and the panel shaft is in interference fit with an inner ring of a vertical bearing and can rotate around an outer ring of the vertical bearing; two slots