Lifting gear and method for starting up the lifting mechanism of such a lifting gear

(canceled)

A method for braking a lifting mechanism for setting down a load on the ground or a drop-off surface, in which a lifting mechanism drive is operated with an initially higher braking torque for initially contacting the load with the drop-off surface and/or initially releasing a lifting means and for continuing the release with a lower braking torque, the method comprising:

• in a phase for initially contacting the drop-off surface and/or initially releasing the lifting means, the braking torque of the lifting mechanism drive is automatically limited by a control device to an initial minimum torque, which is smaller than a load-holding torque required to hold the load, but is greater than a load-free lowering resistance torque due to inherent resistances of the lifting mechanism;
• and
• in a further phase, when a load acting on the lifting mechanism decreases as a result of releasing the lifting means and/or a drive speed of the lifting mechanism drive decreases, for further releasing the minimum torque is reduced and/or the rate of change of the drive speed of the lifting mechanism drive is limited to a minimum deceleration acceleration.

A lifting gear with a lifting mechanism comprising a lifting means for lifting a load, a lifting mechanism drive for actuating the lifting mechanism and a control device for controlling the lifting mechanism drive, wherein the control device has a starting control stage for starting up the lifting mechanism drive with an initially reduced tightening torque for tensioning the lifting means and for continuing the tightening with a then higher tightening torque, wherein the starting control stage of the control device is configured to automatically limit the tightening torque of the lifting mechanism drive to an initial value of maximum torque (Mmax) in a phase for initial tensioning of the lifting means, which is greater than a load-free lifting resistance torque due to inherent resistances of the lifting mechanism, but less than a load lifting torque required for lifting the load, and in a further phase, when the load acting on the lifting mechanism increases due to the tensioning of the lifting means and/or a drive speed of the lifting mechanism drive decreases, to increase the maximum torque (Mmax) and/or to limit the rate of change of the drive speed of the lifting mechanism drive to a maximum tightening acceleration for further tightening.

A lifting gear with a lifting mechanism comprising a lifting means for lifting a load, a lifting mechanism drive for actuating the lifting mechanism and a control device for controlling the lifting mechanism drive, wherein the control device has a braking control stage for braking the lifting mechanism drive with initially higher braking torque for initially contacting the load with the drop-off surface and/or initially releasing the lifting means and for continuing the braking with then lower braking torque, wherein the braking control stage of the control device is configured to automatically limit the braking torque of the lifting mechanism drive to an initial minimum torque which is smaller than a load lifting torque required for lifting the load, in a phase for initial contacting of the lowering surface and/or initial release of the lifting means, but is greater than a load-free lowering resistance torque due to inherent resistances of the lifting mechanism, and, in a further phase, when a load acting on the lifting mechanism decreases due to release of the lifting means and/or a drive speed of the lifting mechanism drive decreases, to reduce the minimum torque for further releasing and/or to limit the rate of change of the drive speed of the lifting mechanism drive to a minimum deceleration acceleration.