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US 10,865,082 B2Granted
Motor-operated crane drive
AssigneeFlender GmbH
InventorAndreas Kube
Life of this patent
Estimating the term…
Abstract
The invention relates to a motor-operated crane drive in which a more rapidly rotating motor (1) drives a more slowly rotating cable drum (3) via a transmission (3). A safety brake (5) is arranged on the more slowly rotating side of the transmission (2). A signal that is used for actuating the safety brake (5) is utilized for initiating an electrical deceleration of the motor (1).
Claims5
A method for operating a motor-driven crane drive, said method comprising:
- arranging a safety brake on a slower-rotating side of a gear unit placed between a faster-rotating electric motor and a slower-rotating rope drum;
- and
- when an emergency stop signal is activated to trigger the safety brake, initiating electric braking of the electric motor by controlling the electric braking with a frequency converter before the safety brake engages in response to the emergency stop signal.
A motor-driven crane drive, comprising:
- a rope drum;
- a control device;
- an electric motor driving the rope drum;
- a gear unit operatively connecting the rope drum with the electric motor;
- a safety brake arranged on a slower-rotating side of the gear unit;
- and
- an emergency stop switch operably connected to the control device, with the control device configured to generate, upon actuation of the emergency stop switch, an emergency stop signal which triggers the safety brake and a further signal which initiates electric braking of the electric motor wherein the further signal initiates the braking of the electric motor before the safety brake engages in response to the emergency stop signal.
4 more elements
Dependencies are inferred from the claim text.