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US 2010/0164151 A1Published application
Non-linear spring isolation device
AssigneeOtis Elevator Company
InventorYu Zhang
Life of this patent
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Abstract
An elevator system includes a car assembly, a drive assembly, and a vibration-damping device (16) arranged at a connection between the top of the car assembly and the drive assembly. The vibration-damping device (16), which includes springs (32, 34, 36) that have varying spring stiffnesses and varying heights, is configured to provide a total spring stiffness between the top of the car assembly and the drive assembly. The total spring stiffness varies as a function of a mass of the car assembly.
Claims44
An elevator system comprising:
- a car assembly;
- a drive assembly;
- and
- a vibration-damping device arranged at a connection between a top of the car assembly and the drive assembly;
- wherein the vibration-damping device, which comprises a plurality of springs that have varying spring stiffnesses and varying heights, is configured to provide a total spring stiffness between the top of the car assembly and the drive assembly, and
- wherein the total spring stiffness varies as a function of a mass of the car assembly.
3 more elements
A vibration-damping device comprising:
- a first spring set comprising one or more springs each having a first stiffness and a first height;
- and
- a second spring set comprising one or more springs each having a second stiffness and a second height;
- wherein the first height and the second height vary;
- wherein the second stiffness and the first stiffness vary;
- and
- wherein the first and second spring sets are arranged in parallel for compression at a connection between a top of an elevator car assembly and a drive assembly.
4 more elements
Dependencies are inferred from the claim text.