Theoretical Estimation of the Weight Distributions on the Tractor Wheels PartII Four Wheeled Tractor

Abstract

Weight distributions on the axle of the farm tractor and its variations due to the change of the situations of the tractor, i, e., weight transfers and the limit conditions which the tractor body is rotated around the rear axle by the moments and which the front wheels are risen above the soil surface are calculted theoretically as following equations.
1. Distributed loads on the front and the rear axles.
(1) Stopping tractor on the level surface……eq. (1)
(2) Stopping on the slope……(4), (5)
(3) Moving on the level……(12), (13)
(4) Moving on the level with drawbar pull……(9), (10)
(5) Moving on the slope with drawbar pull……(23), (24)
2. Weight transfers, (Increases of the loads on the rear axle).
(1) When the stopping tractor moves on the level……W₂
(2) When the moving tractor has the drawbar pull on the level……W₃
(3) When the stopping tractor moves with drawbar pull on the level……W₄
(4) When the stopping tractor on the level moves and stops on the slope……W₁
(5) When the moving tractor on the slope has the drawbar pull……W₅
(6) When the moving tractor on the level with drawbar pull moves on the slope……W₆
3. Limit conditions which the tractor body rotates backward around the rear axle.
(1) Tractor having the drawbar pull on the slope……(29), (30)
(2) Tractor having no drawbar pull on the slope……(31), (33)
(3) Tractor having no drawbar pull on the level……(34), (35)