Traveling Crane Research Articles

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Articles published on Traveling Crane

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Dynamic Stresses in Electric Overhead Travelling Cranes Due to the Hoisting and Lowering of Loads

The paper describes a series of tests which were carried out on three lattice-type electric overhead travelling (E.O.T.) cranes to determine the impulsive effects due to the sudden hoisting and lowering of loads. Dynamic strains were measured from electric-resistance strain-gauge recordings taken during the tests. The stresses computed from these strains are compared with values from a complete theoretical analysis and with values obtained from three approximate formulae. Finally, a method is proposed for the evaluation of the dynamic factor in design.

Proceedings of the Institution of Mechanical Engineers

Jun 1, 1955
E Lightfoot + 1

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The Effect of Tapered Treads on the Motion of Overhead Travelling Cranes

The well-known theory of the motion of a four-wheeled vehicle having pairs of tapered tread wheels joined by an axle is applied to cranes, and is extended to the important case of a four-wheeled crane with only one axle and to eight-wheeled cranes with two pairs of wheels driven by a common shaft. Observations of the actual motion of a number of cranes with parallel and tapered tread wheels are recorded. The tapered tread cranes give sinusoidal curves of motion in good agreement with theory, and design rules for the width of both parallel and tapered treads are suggested.