Konecranes Global Corporation

R. Stahl Fordertechnik Gmbh

Kci Konecranes International Plc

Ari Väisänen

Tomi Heinonen

Frank Hellinger

Mikko Porma

A method comprising: detecting the start of resonance when the chain hoist moves a load, determining a new speed for the rotation of the chain wheel of the chain hoist to avoid resonance, and controlling the chain hoist to use the new speed.

Control of chain hoist

A method for detecting a worn link in a chain of a host arrangement includes measuring a first signal while the hoist operates. A hoist arrangement and use of a signal for detecting a worn link in a chain are also disclosed.

Method of detecting a worn link in a chain, and a hoist arrangement

A travel drive for a trolley traveling gear of hoists has a drive train which has the properties of a freewheel as regards the direction of travel. Consequently load oscillation can be rapidly damped out because the speed of the traveling gear is not forcibly held constant during the semioscillation of the load in which it moves ahead of the traveling gear. On the contrary, the swinging load is able to drag the traveling gear behind it, accelerating it in the process, and in this way to convert oscillation energy into driving energy.

Traveling gear with oscillation damping

An electric drive for the vehicle or traveling mechanism of a lifting appliance contains a control which controls the switching on of the mechanical brake and the switching of the motor current off and on again. In this case, there is provision, in the event of a changeover from a high traveling speed to slow maneuvering speed, for the mechanical brake to remain released until the maneuvering speed is approached. During this phase, the vehicle is decelerated solely by the internal friction and the rolling friction on the rail, in order to avoid inducing any or any additional load pendulum oscillation.

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Hyvinkää, Finland

Ari Väisänen