Clamping device and elevator system

A clamping device, comprising:

• a base having a limiting space and an opening communicating with the limiting space;
• and
• a clamping arm assembly, which is arranged at the opening of the base and forms a gap with the opening in a stationary state, the gap being smaller than a size of a clamped part;
• wherein the clamp arm assembly has a first damping force that allows the clamped part to enter the limiting space via the opening, and has a second damping force that allows the clamped part to exit the limiting space via the opening;
• and the second damping force is greater than the first damping force;
• wherein the clamping arm assembly is hinged to the base, and the clamping arm assembly is capable of rotating toward the limiting space under a driving force no less than the first damping force, and are capable of rotating away from the limiting space under a driving force no less than the second damping force;
• wherein the clamping arm assembly comprises:
• a first-stage force arm and a first-stage damping member, wherein the first-stage damping member applies a damping force to the first-stage force arm when the first-stage force arm rotates either toward or away from the limiting space;
• and
• a second-stage force arm and a second-stage damping member, wherein the second-stage force arm is associated with the first-stage force arm, and moves in association with the first-stage force arm when the first-stage force arm rotates away from the limiting space;
• and when the second-stage force arm moves in association, the second-stage damping member applies a damping force to the second-stage force arm;
• wherein the damping force applied by the first-stage damping member is not greater than the first damping force, and a damping force applied by the first-stage damping member and the second-stage damping member in association is not greater than the second damping force.